Python chapter Nineth modules and Packages (2)

1. If there is no __init__.py file under the file, the program will not consider this to be a python package.

2. This is required if you want to use the From package import *. The file that contains the method in the module does not contain a class:

#coding =utf-8
Import  A
A.say ()
From  Import b
B.say ()


Use from Bao Import *

Write under __init__.py file: __all__==[' A ', ' B '] where a B is the file name under this package

3. Examples introduced when a class is included in a module

#     The 1th approach introduced

From Bao2Import a
from bao2  Import b 
 A.a.say () 
 B.b.say () 
  #引入的第二种方式 
 from bao2.a import a 
 from bao2.b import b 
 A.a.say () 
 B.b.say () 
 # 3rd method introduced      
 from bao import * 
 A.say () 
 B.say ()    

The third way to do before you need to write the following content
What the __init__.py file inside the Bao2 needs to write
#coding =utf-8
Import a    (Class A)
Import b   (class B)

Python chapter Nineth modules and Packages (2)