In python, we often use paths for files. There are usually two types of file paths, namely absolute paths and relative paths.
1. Absolute path:
Generally start from the drive letter, and then search down level by level until you find the required file
Windows绝对路径格式：
C:\Python\python.txt
Linux相对路径格式:
/usr/localinx/confinx.conf
2. Relative path
Sibling relationship: the file we want to use and the python code are in the same folder, just write the file name directly
Upper-level relationship: the file to be used is in the upper-level directory of the python code, and access the upper-level path through .../ (if it is multi-level, use .../.../.../ to access layer by layer)
Subordinate relationship: the files to be used are in the folder at the same level as the python code, accessed through the folder name /