python module built-in variables and their effect

1.__file__

Where Module: os

Variable effect: points to the current file

The full path of the current file: os.path.abspath ( __FILE__ )

The current file Contents: os.path.dirname (os.path.abspath ( __FILE__ ))

Parent directory of the current file belongs directory: os.path.dirname ( os.path.dirname (os.path.abspath ( __FILE__ )) )

 

cat filelocation.py
import os
print(__file__)
print(os.path.abspath("filelocation.py"))
print(os.path.abspath(__file__))
print(os.path.dirname(os.path.abspath(__file__)))
print(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
运行：
filelocation.py
/home/test/CodeProjects/PythonProjects/test/filelocation.py
/home/test/CodeProjects/PythonProjects/test/filelocation.py
/home/test/CodeProjects/PythonProjects/test
/home/test/CodeProjects/PythonProjects