In order to prevent the problem of two modules importing each other, Python only imports all modules once by default. If you need to re-import the module,
Python2.7 can use reload() directly, and Python3 can use the following methods:
Method 1: Basic method
from imp import reload
reload(module)
Method 2: Follow the routine, you can do this
import imp
imp.reload(module)
Method 3: Look Looking at imp.py, I found something, so it can also be like this
import importlib
importlib.reload(module)
Method 4: According to the laws of nature, of course it can also be like this
from importlib import reload
reload(module)