if__name__==__main__:有什么作用

# file one.pydef func():
 print("func() in one.py")
print("top-level in one.py")if __name__ == "__main__":
 print("one.py is being run directly")else:
 print("one.py is being imported into another module")

# file two.pyimport one # start executing one.pyprint("top-level in two.py")
one.func()if __name__ == "__main__":
 print("two.py is being run directly")else:
 print("two.py is being imported into another module")

top-level in one.py
one.py is being run directly

top-level in one.py
one.py is being imported into another module
top-level in one.pyfunc() in one.py
two.py is being run directly