PYTHON Learning 0040: the type and method of introducing a function module --2019-7-27 ---

help ( "modules") to list all comes toolbox and modules imported and write their own.

You can import multiple sub-modules from a module, such as:
from os rmdir, the rename, the Remove
from Import * xx: xx is equivalent to all of the modules in the sub-modules are calling out. Try not recommend this import mode, any variable cause conflict.