Cải thiện bài viết
Lưu bài viết
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
file1 0file1 1Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 0
Hello This is Delhi This is Paris This is London Today1
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 1= Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 3Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 4, Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 6, Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 8Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 9
=2(=4Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 0
=2=7
=2=9
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 Today8Hello This is Delhi This is Paris This is London Today9
file1 0(0Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 0
Hello This is Delhi This is Paris This is London Today1
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 1= Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 3Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 4, Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 6, Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 8Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 9
=2("myfile.txt"3Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 0
=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 Tomorrowfile1 = open("myfile.txt", Hello This is Delhi This is Paris This is London Today8Hello This is Delhi This is Paris This is London Today9 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 0Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 08Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 0
file1 0Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 11Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 0
file1 0Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 14Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 0
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 1= Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 3Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 4, Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 6, Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 8Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 9
=2(=4Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 0
=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 TodayTomorrowfile1 = open("myfile.txt", Hello This is Delhi This is Paris This is London Today8Hello This is Delhi This is Paris This is London Today9 ‘\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 Today9 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 TodayTomorrow 42open("myfile.txt", "w"Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 48
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 49file1 0Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 51Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 0
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 49Hello This is Delhi This is Paris This is London Today0
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 42open("myfile.txt", Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 60Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 48
Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 49file1 0Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 11Output of Readlines after appending This is Delhi This is Paris This is London TodayTomorrow 0
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 TodayTomorrow 49=2=7
Output:
Hello This is Delhi This is Paris This is London Todayfile1 = open("myfile.txt", Hello This is Delhi This is Paris This is London Today8____10 To know more about with statement click here.