Python file read and write operations

The following steps are generally experienced when manipulating files:

• Open File
• Manipulating files

1. Open the file:

File handle = open ('/path/to/file_name ', ' pattern ')

Pattern

• R: Read-only mode, which defaults to read-only mode when opening a file, and the action pointer at the beginning of the file.
• W: Write-only mode, the file does not exist, it is created, the original content is emptied, and the action pointer is at the beginning of the file.
• X: Write-only mode, the file does not exist, it is created, there is a report; The action pointer is at the beginning of the file.
• A: Append, write only, the file does not exist then create, exist in the original file append content, the action pointer to the end of the file.

+ indicates both read and write files:

• r+: Read and Write
• w+: Write Read
• x+: Write Read
• A +: Additional Reading

B means to operate in byte mode:

• RB: Open in bytes, read and write
• WB: Open in bytes, write read
• XB: Opened in bytes, read-write
• AB: Open in bytes, append read

　　NOTICE: When opened in B, the data read is byte type, and the data written is also of type Byte.

Through the With management context:

With open ('/path/to/file_name ', ' pattern ') as file_name:

Pass

With support for managing multiple contexts at python2.7 and beyond

With open ('/path/to/file_name1 ', ' pattern ') as File_name1,open ('/path/to/file_name2 ', ' pattern ') as file_name2:

Pass

Python file read and write operations