About creating Python libraries.

It's simple , First create your Python file , And then add “def Method name :” such as

print()
"""
|
v
"""
def a()：
print()

If you download Python, Then you have a computer called “Lib” The file of , Open that file ：

hold Python The document can be used if it is put here import Import your library

#bcd.py
def a():
print()

Try putting this in it ：

import bcd
bcd.a()

Running results ：

>>>

In this way, the self-made library is completed .