Python - Name & Main筆記

常常會在程式的下看到如下：

if __name__ == '__main__':

__name__是什麼?

__name__用於顯示出目前主程式

主程式會顯示__main__

副程式會直接顯示module模組名稱，如：one.py # one

假如有兩個檔案one.py & two.py

# one.py

def func():

print('func() in one')

print('Top level one.py')

s is one.py {}'.format(__name__))

# two.py

import one

print('Top level two.py')

one.func()

print('This is two.py {}'.format(__name__))

執行two.py

python3 two.py

結果：

Top level one.py

This is one.py one

Top level two.py

func() in one

This is two.py __main__