Hướng dẫn how do you append a list of files in python? - làm cách nào để bạn nối một danh sách các tệp trong python?

Xem thảo luận

Cải thiện bài viết

Lưu bài viết

Xem thảo luận

Cải thiện bài viết

Lưu bài viết

Đọc

• Bàn luận Open the file for writing.
• Trong khi đọc hoặc ghi vào một tệp, chế độ truy cập chi phối loại hoạt động có thể trong tệp đã mở. Nó đề cập đến cách các tập tin sẽ được sử dụng sau khi nó mở. Các chế độ này cũng xác định vị trí của xử lý tệp trong tệp. Định nghĩa của các chế độ truy cập này như sau: Open the file for reading and writing.

Chỉ nối thêm (‘A,): Mở tệp để viết.

Nối và đọc (‘A+,): Mở tệp để đọc và viết. Python program to illustrate Append vs write mode.

Python3

Khi tệp được mở ở chế độ nối trong Python, tay cầm được định vị ở cuối tệp. Dữ liệu được viết sẽ được chèn vào cuối, sau dữ liệu hiện có. & NBSP;

Ví dụ 1: Chương trình Python để minh họa Chế độ ghi vs Viết.

all_values.extend(map(int, row))

all_values.extend(map(int, row))

Các

Các

all_values.extend(map(int, row))

Các

Output of Readlines after appending
This is Delhi
This is Paris
This is LondonToday


Output of Readlines after writing
Tomorrow

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

Output of Readlines after appending
This is Delhi
This is Paris
This is London
TodayTomorrow

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

Output of Readlines after appending
This is Delhi
This is Paris
This is LondonToday


Output of Readlines after writing
Tomorrow

Output of Readlines after appending
This is Delhi
This is Paris
This is London
TodayTomorrow

Output of Readlines after appending
This is Delhi
This is Paris
This is LondonToday


Output of Readlines after writing
Tomorrow

Output of Readlines after appending
This is Delhi
This is Paris
This is London
TodayTomorrow

all_values.extend(map(int, row))

all_values.extend(map(int, line.strip().split(',')))

all_values.extend(map(int, line.strip().split(',')))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values.extend(map(int, line.strip().split(',')))

Hello
This is Delhi
This is Paris
This is London
Today

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values.extend(map(int, row))

Các

Output of Readlines after appending
This is Delhi
This is Paris
This is LondonToday


Output of Readlines after writing
Tomorrow

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

Output of Readlines after appending
This is Delhi
This is Paris
This is LondonToday


Output of Readlines after writing
Tomorrow

Output of Readlines after appending
This is Delhi
This is Paris
This is London
TodayTomorrow

Output of Readlines after appending
This is Delhi
This is Paris
This is LondonToday


Output of Readlines after writing
Tomorrow

Output of Readlines after appending
This is Delhi
This is Paris
This is London
TodayTomorrow

all_values.extend(map(int, row))

Output:

Output of Readlines after appending
This is Delhi
This is Paris
This is LondonToday


Output of Readlines after writing
Tomorrow

all_values.extend(map(int, line.strip().split(','))) 7all_values.extend(map(int, line.strip().split(','))) 8all_values = [] with open('scores.txt', newline='') as infile: for line in infile: all_values.extend(line.strip().split(',')) 7  Append data from a new line

Các

Python3

Khi tệp được mở ở chế độ nối trong Python, tay cầm được định vị ở cuối tệp. Dữ liệu được viết sẽ được chèn vào cuối, sau dữ liệu hiện có. & NBSP;

Ví dụ 1: Chương trình Python để minh họa Chế độ ghi vs Viết.

all_values.extend(map(int, row))

all_values.extend(map(int, row))

Các

all_values.extend(map(int, line.strip().split(',')))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values.extend(map(int, line.strip().split(',')))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values.extend(map(int, line.strip().split(',')))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

Các

Output of Readlines after appending
This is Delhi
This is Paris
This is LondonToday


Output of Readlines after writing
Tomorrow

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

Output of Readlines after appending
This is Delhi
This is Paris
This is London
TodayTomorrow

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

Output of Readlines after appending
This is Delhi
This is Paris
This is LondonToday


Output of Readlines after writing
Tomorrow

Output of Readlines after appending
This is Delhi
This is Paris
This is London
TodayTomorrow

Output of Readlines after appending
This is Delhi
This is Paris
This is LondonToday


Output of Readlines after writing
Tomorrow

Output of Readlines after appending
This is Delhi
This is Paris
This is London
TodayTomorrow

all_values.extend(map(int, row))

Output:

Output of Readlines after appending
This is Delhi
This is Paris
This is London
TodayTomorrow

all_values.extend(map(int, line.strip().split(',')))

all_values.extend(map(int, line.strip().split(',')))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

Các  Using With statement  in Python

Các is used in exception handling to make the code cleaner and much more readable. It simplifies the management of common resources like file streams. Unlike the above implementations, there is no need to call file.close() when using with statement. The with statement itself ensures proper acquisition and release of resources. 

Python3

Ví dụ 2: & nbsp; nối dữ liệu từ một dòng mới

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values.extend(map(int, line.strip().split(',')))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values.extend(map(int, row))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values.extend(map(int, line.strip().split(',')))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

Trong ví dụ trên về xử lý tệp, có thể thấy rằng dữ liệu không được thêm vào dòng mới. Điều này có thể được thực hiện bằng cách viết ký tự mới ‘\ n, vào tệp. & Nbsp;

all_values = []

with open('scores.txt', newline='') as infile:
    for line in infile:
        all_values.extend(line.strip().split(','))

Output of Readlines after appending
This is Delhi
This is Paris
This is LondonToday


Output of Readlines after writing
Tomorrow

Output of Readlines after appending
This is Delhi
This is Paris
This is London
TodayTomorrow

Output:

Hello
This is Delhi
This is Paris
This is London
Today

Các To know more about with statement click here.