Novice ở đây. Tôi đang cố gắng đọc các dòng từ một tệp, tuy nhiên một dòng duy nhất trong tệp .txt có \n ở giữa ở đâu đó và trong khi cố gắng đọc dòng đó với .Readline Python cắt nó ở giữa và xuất ra dưới hai dòng.
Khi tôi sao chép và qua dòng vào cửa sổ này, nó sẽ hiển thị dưới dạng hai dòng. Vì vậy, tôi đã tải lên tệp ở đây: //ufile.io/npt3n
Cũng đã thêm ảnh chụp màn hình của tệp như hiển thị trong tệp TXT.
- Đây là lịch sử trò chuyện nhóm được xuất từ WhatsUp..nếu bạn đang tự hỏi.
- Vui lòng giúp tôi đọc một dòng hoàn toàn như được hiển thị trong tệp TXT.
.
f= open["f.txt",mode='r',encoding='utf8']
for i in range[4]:
lineText=f.readline[]
print[lineText]
f.close[]
Devssh
1.16412 Huy hiệu bạc26 Huy hiệu đồng12 silver badges26 bronze badges
Hỏi ngày 23 tháng 8 năm 2018 lúc 7:49Aug 23, 2018 at 7:49
6
Python 3 cho phép bạn xác định dòng mới cho một tệp cụ thể là gì. Nó hiếm khi được sử dụng, bởi vì chế độ Newlines phổ quát mặc định rất khoan dung:
Khi đọc đầu vào từ luồng, nếu NewLine không có, chế độ Newlines phổ quát được bật. Các dòng trong đầu vào có thể kết thúc trong '\ n', '\ r' hoặc '\ r \ n' và chúng được dịch thành '\ n' trước khi được trả lại cho người gọi.
Vì vậy, ở đây bạn nên nói rõ rằng chỉ '\ r \ n' là một kết thúc của dòng:
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Đã trả lời ngày 23 tháng 8 năm 2018 lúc 8:32Aug 23, 2018 at 8:32
Serge Ballestaserge BallestaSerge Ballesta
Huy hiệu vàng 139K1111 gold badges115 silver badges235 bronze badges
4
Thay vì sử dụng chức năng Readline, bạn có thể đọc toàn bộ nội dung và các dòng phân chia bằng regex:
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Nếu tất cả nội dung có cùng một khởi đầu [...] bạn có thể phân chia bằng cách này, thì hãy làm sạch tất cả các bộ phận bỏ qua các phần tử "". Sau đó, bạn có thể tham gia từng phần với chức năng ZIP [//stackoverflow.com/a/5851033/1038301]
Đã trả lời ngày 23 tháng 8 năm 2018 lúc 8:11Aug 23, 2018 at 8:11
RoomMroommRoomm
88512 Huy hiệu bạc22 Huy hiệu đồng12 silver badges22 bronze badges
1
Prerequisites:
- Chế độ truy cập & nbsp;
- Mở tệp & nbsp;
- Đóng một tập tin & nbsp;
Python cung cấp các chức năng sẵn có để tạo, viết và đọc các tệp. Có hai loại tệp có thể được xử lý trong Python, tệp văn bản thông thường và tệp nhị phân [được viết bằng ngôn ngữ nhị phân, 0S và 1S]. Trong bài viết này, chúng tôi sẽ nghiên cứu đọc từng dòng từ một tệp.
Phương pháp 1: Đọc từng dòng tệp bằng cách sử dụng readlines []
Readlines [] được sử dụng để đọc tất cả các dòng trong một lần và sau đó trả về chúng dưới dạng mỗi dòng một phần tử chuỗi trong một danh sách. Hàm này có thể được sử dụng cho các tệp nhỏ, vì nó đọc toàn bộ nội dung tệp vào bộ nhớ, sau đó chia nó thành các dòng riêng biệt. Chúng ta có thể lặp lại danh sách và dải ký tự mới \ n, bằng cách sử dụng hàm Dải [].
Example:
Python3
____10
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1: Geeks Line2: for Line3: Geeks5
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Line1: Geeks Line2: for Line3: Geeks7
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1: Geeks Line2: for Line3: Geeks9
Line1 Geeks Line2 for Line3 Geeks0
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1 Geeks Line2 for Line3 Geeks2
Line1 Geeks Line2 for Line3 Geeks3
Line1 Geeks Line2 for Line3 Geeks4
Line1 Geeks Line2 for Line3 Geeks5
Line1 Geeks Line2 for Line3 Geeks6
Line1 Geeks Line2 for Line3 Geeks7
Line1 Geeks Line2 for Line3 Geeks0
Line1 Geeks Line2 for Line3 Geeks9
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Using for loop Line1: Geeks Line2: for Line3: Geeks1
Line1 Geeks Line2 for Line3 Geeks7
Using for loop Line1: Geeks Line2: for Line3: Geeks3
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Using for loop Line1: Geeks Line2: for Line3: Geeks5
Using for loop Line1: Geeks Line2: for Line3: Geeks6
Using for loop Line1: Geeks Line2: for Line3: Geeks7
Using for loop Line1: Geeks Line2: for Line3: Geeks8
Output:
Line1: Geeks Line2: for Line3: Geeks
Phương pháp 2: Đọc từng dòng tệp bằng cách sử dụng readline []
hàm readline [] đọc một dòng của tệp và trả lại dưới dạng chuỗi. Nó có một tham số n, trong đó chỉ định số lượng byte tối đa sẽ được đọc. Tuy nhiên, không đọc nhiều hơn một dòng, ngay cả khi N vượt quá độ dài của dòng. Nó sẽ hiệu quả khi đọc một tệp lớn vì thay vì tìm nạp tất cả dữ liệu trong một lần, nó tìm thấy từng dòng. readline [] trả về dòng tiếp theo của tệp có chứa ký tự dòng mới cuối cùng. Ngoài ra, nếu kết thúc của tệp, nó sẽ trả về một chuỗi trống.
Example:
Python3
____10
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Using readlines[] Line1: Geeks Line2: for Line3: Geeks Using readline[] Line1: Geeks Line2: for Line3: Geeks Using for loop Line1: Geeks Line2: for Line3: Geeks6
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1: Geeks Line2: for Line3: Geeks5
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Line1 Geeks Line2 for Line3 Geeks0
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1 Geeks Line2 for Line3 Geeks2
Line1 Geeks Line2 for Line3 Geeks3
Line1 Geeks Line2 for Line3 Geeks4
Line1 Geeks Line2 for Line3 Geeks5
Line1 Geeks Line2 for Line3 Geeks6
Line1 Geeks Line2 for Line3 Geeks7
Line1 Geeks Line2 for Line3 Geeks0
Line1 Geeks Line2 for Line3 Geeks9
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Using for loop Line1: Geeks Line2: for Line3: Geeks1
Phương pháp 2: Đọc từng dòng tệp bằng cách sử dụng readline []
hàm readline [] đọc một dòng của tệp và trả lại dưới dạng chuỗi. Nó có một tham số n, trong đó chỉ định số lượng byte tối đa sẽ được đọc. Tuy nhiên, không đọc nhiều hơn một dòng, ngay cả khi N vượt quá độ dài của dòng. Nó sẽ hiệu quả khi đọc một tệp lớn vì thay vì tìm nạp tất cả dữ liệu trong một lần, nó tìm thấy từng dòng. readline [] trả về dòng tiếp theo của tệp có chứa ký tự dòng mới cuối cùng. Ngoài ra, nếu kết thúc của tệp, nó sẽ trả về một chuỗi trống.
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
.txt9 \n0\n1
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Output:
Line1 Geeks Line2 for Line3 Geeks
Line1 Geeks
Line2 for
Line3 Geeks
7Line1 Geeks
Line2 for
Line3 Geeks
4f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
1 f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
00
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1 Geeks Line2 for Line3 Geeks7
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Example:
Python3
____10
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1: Geeks Line2: for Line3: Geeks5
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Line1 Geeks Line2 for Line3 Geeks0
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1 Geeks Line2 for Line3 Geeks2
Line1 Geeks Line2 for Line3 Geeks3
Line1 Geeks Line2 for Line3 Geeks4
Line1 Geeks Line2 for Line3 Geeks5
Line1 Geeks Line2 for Line3 Geeks6
Line1 Geeks Line2 for Line3 Geeks7
Line1 Geeks Line2 for Line3 Geeks0
Line1 Geeks Line2 for Line3 Geeks9
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Using for loop Line1: Geeks Line2: for Line3: Geeks1
Line1 Geeks Line2 for Line3 Geeks7
Line1 Geeks Line2 for Line3 Geeks0
Line1 Geeks Line2 for Line3 Geeks9
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Using for loop Line1: Geeks Line2: for Line3: Geeks1
Line1 Geeks Line2 for Line3 Geeks7
Using for loop Line1: Geeks Line2: for Line3: Geeks3
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Using for loop Line1: Geeks Line2: for Line3: Geeks5
Using for loop Line1: Geeks Line2: for Line3: Geeks6
Using for loop Line1: Geeks Line2: for Line3: Geeks7
Using for loop Line1: Geeks Line2: for Line3: Geeks8
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Output:
Using for loop Line1: Geeks Line2: for Line3: Geeks
Phương pháp 2: Đọc từng dòng tệp bằng cách sử dụng readline []
hàm readline [] đọc một dòng của tệp và trả lại dưới dạng chuỗi. Nó có một tham số n, trong đó chỉ định số lượng byte tối đa sẽ được đọc. Tuy nhiên, không đọc nhiều hơn một dòng, ngay cả khi N vượt quá độ dài của dòng. Nó sẽ hiệu quả khi đọc một tệp lớn vì thay vì tìm nạp tất cả dữ liệu trong một lần, nó tìm thấy từng dòng. readline [] trả về dòng tiếp theo của tệp có chứa ký tự dòng mới cuối cùng. Ngoài ra, nếu kết thúc của tệp, nó sẽ trả về một chuỗi trống.
Thí dụ
Python3
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1 Geeks Line2 for Line3 Geeks7
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1 Geeks Line2 for Line3 Geeks3
Line1 Geeks Line2 for Line3 Geeks4
Line1 Geeks Line2 for Line3 Geeks5
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Using for loop Line1: Geeks Line2: for Line3: Geeks3
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1 Geeks Line2 for Line3 Geeks7
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1 Geeks Line2 for Line3 Geeks3
Line1 Geeks Line2 for Line3 Geeks4
Line1 Geeks Line2 for Line3 Geeks5
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Using for loop Line1: Geeks Line2: for Line3: Geeks3
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Output:
['Geeks\n', 'For\n', 'Geeks'] ['Geeks', 'For', 'Geeks']
Với tuyên bố
Trong các cách tiếp cận trên, mỗi khi tập tin được mở, cần phải đóng một cách rõ ràng. Nếu người ta quên đóng tệp, nó có thể giới thiệu một số lỗi trong mã, tức là nhiều thay đổi trong các tệp không có hiệu lực cho đến khi tệp được đóng đúng. Để ngăn chặn điều này với tuyên bố có thể được sử dụng. Tuyên bố với Python được sử dụng trong xử lý ngoại lệ để làm cho mã sạch hơn và dễ đọc hơn nhiều. Nó đơn giản hóa việc quản lý các tài nguyên chung như luồng tệp. Quan sát ví dụ mã sau về cách sử dụng với câu lệnh làm cho mã sạch hơn. Không cần gọi tệp.close [] khi sử dụng với câu lệnh. Với tuyên bố tự đảm bảo mua lại và phát hành các tài nguyên thích hợp.
Example:
Python3
____10
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Các
Line1 Geeks Line2 for Line3 Geeks7
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Line1 Geeks Line2 for Line3 Geeks0
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1 Geeks Line2 for Line3 Geeks2
Using for loop Line1: Geeks Line2: for Line3: Geeks3
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Line1 Geeks Line2 for Line3 Geeks7
Line1: Geeks Line2: for Line3: Geeks7
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Line1 Geeks Line2 for Line3 Geeks7
Line1 Geeks Line2 for Line3 Geeks3
Line1 Geeks Line2 for Line3 Geeks4
Line1 Geeks Line2 for Line3 Geeks5
Line1 Geeks Line2 for Line3 Geeks6
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1 Geeks Line2 for Line3 Geeks0
Line1 Geeks Line2 for Line3 Geeks9
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Using for loop Line1: Geeks Line2: for Line3: Geeks1
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Using for loop Line1: Geeks Line2: for Line3: Geeks3
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Using for loop Line1: Geeks Line2: for Line3: Geeks5
Using for loop Line1: Geeks Line2: for Line3: Geeks6
Using for loop Line1: Geeks Line2: for Line3: Geeks7
Using for loop Line1: Geeks Line2: for Line3: Geeks8
Line1 Geeks Line2 for Line3 Geeks0
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1 Geeks Line2 for Line3 Geeks2
Using for loop Line1: Geeks Line2: for Line3: Geeks3
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Line1 Geeks Line2 for Line3 Geeks7
Line1: Geeks Line2: for Line3: Geeks7
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1 Geeks Line2 for Line3 Geeks0
Line1 Geeks Line2 for Line3 Geeks9
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Using for loop Line1: Geeks Line2: for Line3: Geeks1
Line1 Geeks Line2 for Line3 Geeks7
.txt9 \n0\n1f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1 Geeks Line2 for Line3 Geeks4
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Using for loop Line1: Geeks Line2: for Line3: Geeks3
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Using for loop Line1: Geeks Line2: for Line3: Geeks5
Using for loop Line1: Geeks Line2: for Line3: Geeks6
Using for loop Line1: Geeks Line2: for Line3: Geeks7
Using for loop Line1: Geeks Line2: for Line3: Geeks8
Line1 Geeks Line2 for Line3 Geeks0
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1 Geeks Line2 for Line3 Geeks2
Using for loop Line1: Geeks Line2: for Line3: Geeks3
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Line1 Geeks Line2 for Line3 Geeks7
Line1: Geeks Line2: for Line3: Geeks7
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Line1 Geeks Line2 for Line3 Geeks0
Line1 Geeks Line2 for Line3 Geeks9
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Using for loop Line1: Geeks Line2: for Line3: Geeks1
f= open["f.txt",mode='r',encoding='utf8', newline='\r\n']
# use enumerate to show that second line is read as a whole
for i, line in enumerate[fd]:
print[i, line]
Using for loop Line1: Geeks Line2: for Line3: Geeks3
import re
with open["txt", "r"] as f:
content = f.read[]
# remove end line characters
content = content.replace["\n", ""]
# split by lines
lines = re.compile["[\[[0-9//, :\]]+]"].split[content]
# clean "" elements
lines = [x for x in lines if x != ""]
# join by pairs
lines = [i + j for i, j in zip[lines[::2], lines[1::2]]]
Using for loop Line1: Geeks Line2: for Line3: Geeks5
Using for loop Line1: Geeks Line2: for Line3: Geeks6
Using for loop Line1: Geeks Line2: for Line3: Geeks7
Using for loop Line1: Geeks Line2: for Line3: Geeks8
Output:
Using readlines[] Line1: Geeks Line2: for Line3: Geeks Using readline[] Line1: Geeks Line2: for Line3: Geeks Using for loop Line1: Geeks Line2: for Line3: Geeks
Làm cách nào để đọc một dòng tệp văn bản từng dòng trong Python?
Phương pháp 1: Đọc một dòng theo từng dòng bằng cách sử dụng readlines [] readlines [] được sử dụng để đọc tất cả các dòng trong một lần và sau đó trả về chúng dưới dạng mỗi dòng một phần tử chuỗi trong một danh sách. Hàm này có thể được sử dụng cho các tệp nhỏ, vì nó đọc toàn bộ nội dung tệp vào bộ nhớ, sau đó chia nó thành các dòng riêng biệt.using readlines[]
readlines[] is used to read all the lines at a single go and then return them as each line a string element in a list. This function can be used for small files, as it reads the whole file content to the memory, then split it into separate lines.
Làm cách nào để đọc một tệp văn bản được phân định trong Python?
Solution..
Bước 1: Mở tệp văn bản bằng hàm Open [].....
Đọc qua tệp một dòng tại một thời điểm bằng cách sử dụng một vòng lặp ..
Chia dòng thành một mảng.....
Xuất nội dung của từng trường bằng phương thức in ..
Sau khi hoàn thành vòng lặp FOR, hãy đóng tệp bằng phương thức đóng [] ..
Làm thế nào để bạn đi đến dòng tiếp theo trong khi đọc một tệp trong Python?
Đọc một dòng theo từng dòng bằng cách sử dụng readline [] readline [] trả về dòng tiếp theo trong tệp sẽ chứa ký tự dòng cuối cùng.
Làm thế nào để bạn đọc nhiều dòng từ một tệp văn bản trong Python?
Phương thức 1: FileObject.ReadLines [] Một đối tượng tệp có thể được tạo trong python và sau đó readlines [] phương thức có thể được gọi trên đối tượng này để đọc các dòng vào một luồng.Phương pháp này được ưa thích khi một dòng hoặc một phạm vi dòng từ tệp cần được truy cập đồng thời.fileobject.readlines[]
A file object can be created in Python and then readlines[] method can be invoked on this object to read lines into a stream. This method is preferred when a single line or a range of lines from a file needs to be accessed simultaneously.