Python file operation Seek () and telll () self-explanatory

Python file operation Seek () and telll () self-explanatory

File.seek () method format: Seek (offset,whence=0) Move file read pointer to set position

Offset: The starting offset, which represents the number of bytes that need to move the offset.

Whence: A definition of the offset parameter that indicates which position to start the offset from, 0 for the beginning of the file, 1 for starting from the current position, and 2 for starting from the end of the file.　                        When there is a newline, it is truncated by line breaks. Seek () No return value, so the value is None

Tell (): The current position of the liberal arts file, that is, tell is to get the file pointer position.

ReadLine (N): reads in several rows, and n represents the maximum number of bytes read in.

ReadLines (): reads the contents of all rows

Read reads the contents of all rows

Tell (): Returns the location of the file read pointer

The main 3 modes of Seek are:

(1) F.seek ()

　

Python file operation Seek () and telll () self-explanatory