17 file opening mode and file object Method

File opening Mode

Open Mode	Perform operations
'R'	Open a file in read-only mode (default)
'W'	Opening the file as a write will overwrite the existing file
'X'	If the file already exists, opening in this mode will cause an exception.
'A'	Open in write mode. If the file exists, append it to the end.
'B'	Open a file in binary mode
'T'	Open in text mode (default)
'+'	Read/write mode (can be added to other modes)
'U'	Support for common line breaks

File object Method

File object Method	Perform operations
F. Close ()	Close file
F. Read ([size =-1])	Read size characters from the file. When no size is specified or a negative value is given, read all the remaining characters and return them as strings.
F. Readline ([size =-1])	Read from the file and return a row (including the row Terminator). If the size is defined, the return size is a string of characters.
F. Write (STR)	Write string STR to file
F. writelines (SEQ)	Writing string sequence seq to a file. seq should be an iteratable object that returns a string.
F. Seek (offset, from)	Move the file pointer in the file, and offset the offset byte from (0 indicates the start position of the file, 1 indicates the current position, and 2 indicates the end of the file ).
F. Tell ()	Returns the current position in the file.
F. truncate ([size = file. Tell ()])	Truncates a file to the size byte. By default, it is truncated to the current position of the file pointer.

17 file opening mode and file object method ()