方法一:函数添加
1 import sys
2 查看sys.path3 添加sys.path.append("c:\\")
方法二:修改环境变量
用户可以修改系统环境变量PYTHONPATH
设置PYTHONPATH环境变量，
右击【我的电脑】-【属性】-【高级系统设置】-【环境变量】-【新建】，变量名写PYTHONPATH，变量值就是你要导入模块的路径了，以后还要导入其他模块，就继续在后面添加路径，至此，已经设置好了。
方法三:增加.pth文件，推荐！
在site-packages添加一个路径文件，如mypkpath.pth，必须以.pth为后缀，写上你要加入的模块文件所在的目录名称就是了。 1 windows c:\python27\site-packages# 把pth文件直接放在c:\python27# (或其他python安装目录)目录下测试也是有效的 2 linux(ubuntu) /usr/local/lib/python2.7/dist-packages （note by shanql， 我是放在这个目录下有效的，所添加的目录一定要存在，不存在则会不成功）2 linux(redhat) /usr/lib/python2.7/site-packages>>> sys.path['/home/fightlikekobe', '/usr/bin', '/usr/local/lib/python2.7/dist-packages/pymysql_sa-1.0-py2.7.egg', '/usr/local/lib/python2.7/dist-packages/PyMySQL-0.5-py2.7.egg', '/usr/local/lib/python2.7/dist-packages/hiredis-0.1.0-py2.7-linux-i686.egg', '/usr/local/lib/python2.7/dist-packages/SQLAlchemy-0.7.3-py2.7-linux-i686.egg', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-linux2', '/usr/lib/python2.7/lib-tk', '/usr/lib/python2.7/lib-old', '/usr/lib/python2.7/lib-dynload', '/usr/local/lib/python2.7/dist-packages', '/usr/local/lib/python2.7/dist-packages', '/home/fightlikekobe/python', '/usr/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages/PIL', '/usr/lib/python2.7/dist-packages/gst-0.10', '/usr/lib/python2.7/dist-packages/gtk-2.0', '/usr/lib/pymodules/python2.7', '/usr/lib/python2.7/dist-packages/ubuntu-sso-client', '/usr/lib/python2.7/dist-packages/ubuntuone-client', '/usr/lib/python2.7/dist-packages/ubuntuone-control-panel', '/usr/lib/python2.7/dist-packages/ubuntuone-couch', '/usr/lib/python2.7/dist-packages/ubuntuone-installer', '/usr/lib/python2.7/dist-packages/ubuntuone-storage-protocol', '/usr/lib/python2.7/dist-packages/wx-2.8-gtk2-unicode']
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