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Detailed explanation of python custom modules and packages

高洛峰
高洛峰Original
2017-03-16 14:19:572206browse

1、保存一个hello.py文件在F:/data/python目录下

  • hello.py

>>> def hello(x):    print x

  • 目录

详解python自定义模块、包

  • 导入

>>> import sys>>> sys.path.append('F:/data/python') #添加路径,此添加是一次性的>>> import hello>>> hello.hello(5)  #调用5

 2、不改变sys.path导入自定义模块:

第一种方法:将hello2.py文件放在D:/Python27/lib/site-packages目录下

>>> import sys,pprint>>> pprint.pprint(sys.path)
['', 'D:\\Python27\\Lib\\idlelib', 'F:\\data\\s', 'D:\\Python27', 'C:\\Windows\\system32\\python27.zip', 'D:\\Python27\\DLLs', 'D:\\Python27\\lib', 'D:\\Python27\\lib\\plat-win', 'D:\\Python27\\lib\\lib-tk', 'D:\\Python27\\lib\\site-packages']>>> import hello2>>> hello2.hello()
hello,world!

 第二种方法:将F:/data/python路径添加到环境变量(在系统变量中,添加PYTHONPATH变量,再将路径添加到值中)

>>> import sys>>> import hello>>> hello.hello(1)1

 3、自定义包,导入模块

首先,创建如下目录,pytest为包,将路径F:\test添加到环境变量PYTHONPATH中,pytest包中init.py文件是必要的,内容可以为空

详解python自定义模块、包

>>> import sys>>> from pytest import hello>>> hello.hello(4)4

 

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