There are many kinds of operations on files in Python. Common operations include create, delete, modify permissions, read, write, etc. These operations can be roughly divided into the following 2 categories:
Among them, the system-level operation function of the file is single and relatively easy to implement. It can be implemented by using a special module (os, sys, etc.) in Python and calling a specified function in the module. For example, suppose there is a file "a.txt" in the sibling directory of the following code file. You can delete the file by calling the remove function in the os module. The specific implementation code is as follows:
import os os.remove('a.txt')
For file-level operations, you usually need to follow fixed steps, and the implementation process is relatively complicated, and it is also the focus of this chapter.
The file-level operation of the file can be divided into the following 3 steps, each of which needs to be implemented with the corresponding function:
A file must be opened before it can be operated, and after the operation is over, it should be closed. The sequence of these 3 steps must not be disturbed.
Each function of the above operation file will be introduced in detail as a section.
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