main function in python module

class A:
    def __init__(self):
        pass


def main():
    print("Hello World")


if __name__ == '__main__':
    main()

see also

• stackoverflow

Python: module file name conflicts with the package name

I have a python module file named xml.py, in the module

import xml.etree.ElementTree as ET
... ...

When executing the file, it raises the following error:

ImportError: No module named etree.ElementTree

According the stackoverflow post, it was caused by the moudle file name xml.py, rename the xml.py to something else resolved the issue.