<<Python编程实践>>之which is __main__

源代码文件

1.test_main.py

#!/usr/bin/pythonif __name__ == "__main__":print "I am the main program."else:print "Someone is importing me."

运行结果：

2.echo.py

#!/usr/bin/pythonimport test_mainprint "echo: __name__ is", __name__

运行结果：

3.import_echo.py

#!/usr/bin/pythonimport echoprint "After import, __name__ is", __name__, "and echo.__name__ is", echo.__name__

运行结果：