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.
Hello This is Delhi This is Paris This is London Today0
Hello This is Delhi This is Paris This is London Today1
file1
=
open
[
"myfile.txt"
____"w"
____9____10
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow1
=
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow3
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow4
,
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow6
,
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow8
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow9
Hello This is Delhi This is Paris This is London Today1
file1
=
open
[
"myfile.txt"
,
Hello This is Delhi This is Paris This is London Today8
Hello This is Delhi This is Paris This is London Today9
=
2[
=
4
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow0
=
2=
7
=
2=
9
Hello This is Delhi This is Paris This is London Today1
file1
0file1
1
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow0
file1
0[
0
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow0
Hello This is Delhi This is Paris This is London Today1
file1
=
open
[
"myfile.txt"
,
Hello This is Delhi This is Paris This is London Today8
Hello This is Delhi This is Paris This is London Today9
=
2[
"myfile.txt"
3
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow0
=
2=
7
=
2=
9
Hello This is Delhi This is Paris This is London Today1
Output:
Output of Readlines after appending This is Delhi This is Paris This is LondonToday Output of Readlines after writing Tomorrow
file1
0file1
1Output of Readlines after appending
This is Delhi
This is Paris
This is London
TodayTomorrow
0 Append data from a new line
file1
=
open
[
"myfile.txt"
,
____404010
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.
Hello This is Delhi This is Paris This is London Today0
Hello This is Delhi This is Paris This is London Today1
file1
=
open
[
"myfile.txt"
____"w"
____9____10
file1
0
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow08
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow0
file1
0
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow11
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow0
file1
0
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow14
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow0
file1
=
open
[
"myfile.txt"
,
Hello This is Delhi This is Paris This is London Today8
Hello This is Delhi This is Paris This is London Today9
=
2[
=
4
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow0
=
2=
7
=
2=
9
Hello This is Delhi This is Paris This is London Today1
Output:
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow
file1
0file1
1Output of Readlines after appending
This is Delhi
This is Paris
This is London
TodayTomorrow
0 ‘\n’ is treated as a special character of two bytes.
file1
=
open
[
"myfile.txt"
,
____404010 Using With statement in Python
file1
=
open
[
"myfile.txt"
________"w"
Hello
This is Delhi
This is Paris
This is London
Today
9 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
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow42
open
[
"myfile.txt"
,
"w"
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow48
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow49
file1
0Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow51
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow0
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow49
Hello This is Delhi This is Paris This is London Today0
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow42
open
[
"myfile.txt"
,
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow60
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow48
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow49
file1
0Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow11
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow0
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;
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow49
=
2=
7Output:
Hello This is Delhi This is Paris This is London Today
file1
=
open
[
"myfile.txt"
,
Hello
This is Delhi
This is Paris
This is London
Today
8____10 To know more about with statement click here.