Use of __name__ in "python" python

py1.py

#！ /usr/bin/env pythondef Test ():    print ' __name__ = ', __name__if __name__ = = ' __main__ ':    Test ()

py2.py

#！ /usr/bin/env pythonimport py1.pydef Test ():    print ' __name__ = ', __name__   if __name__ = = ' __main__ ':    Test () C6/>print ' py1.py __name__ = ', py1.__name__

Execution Result:

__name__=__main__

py1.py __name__=py1
Through the results can be known, py2.py directly execute, then the value of the built-in variable __name__ is __main__, otherwise the name of the module, through this feature can add test code inside the IF statement, can improve the reduction of bugs, improve the robustness of the program.

if __name__ = = ' __main__ ':
Test ()

Use of __name__ in "python" python