Python Learning Notes (7)-Functions, modules, Packages

First, the function

To define a function:

def Fun_name (para_list):    coding

def fun_name (para_list):
    Coding
    return XXX

Using functions, Fun_name (para)

Local variables, global variables are the same as C, local variables inside functions, files visible, global variables.

Second, the module

The module is a collection of functions, first imported and then used, import time Time.asctime ()

Three, the package

Package: Contains multiple modules from the PIL import image to import an image module from the PIL package.

Python Learning Notes (7)-Functions, modules, Packages