


Detailed explanation of python custom modules and packages
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
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
>>> import sys>>> from pytest import hello>>> hello.hello(4)4
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