1、 The common causes and solutions of error3 are as follows

1. The MKDIR function creates several directories in succession. In other words, there is no f/AA/originally. If you need to create f/AA/BB, you will get this error,

Solution, layer by layer detection, or directly use the makedirs function.

2. Lisdir enumerates directories that do not exist.

Solution: before enumerating, judge whether the changed path exists.

3. Creating a file in a read-only folder will also produce the above error.

4. Coding problem: pay attention to the coding format of the file, and modify it in the first line of Py file.

2、 Common windows error and its causes

Windows error: [error 2] does not exist

Windows error: [error 3] does not have this path

Windows error: [error 5] permission problem

Windows error: [error 13] this document is occupied by other programs and cannot be processed

Windows error: [error 123] path syntax error
error

Windows error: [error 145] the directory is not empty. It often appears when deleting a non empty directory