1. import 搜索路径
import sys
sys.path
路径搜索
- 从上面列出的目录里依次查找要导入的模块文件
- ’ ’ 表示当前路径
程序执行时导入模块路径
sys.path.append('/home/itcast/xxx')
sys.path.insert(0, '/home/itcast/xxx') #可以确保先搜索这个路径
In [37]: sys.path.insert(0,"/home/python/xxxx")
In [38]: sys.path
Out[38]:
['/home/python/xxxx',
'',
'/usr/bin',
'/usr/lib/python35.zip',
'/usr/lib/python3.5',
'/usr/lib/python3.5/plat-x86_64-linux-gnu',
'/usr/lib/python3.5/lib-dynload',
'/usr/local/lib/python3.5/dist-packages',
'/usr/lib/python3/dist-packages',
'/usr/lib/python3/dist-packages/IPython/extensions',
'/home/python/.ipython']
2. 重新导入模块
模块被导入后,import module
不能重新导入模块,重新导入需用