python PYTHONPATH的设置

设置不当会导致错误：

ImportError: No module named CrazyMonitorClient.core

方法一：
vi ~/.bashrc
输入：export PYTHONPATH=/home/zm/PycharmProjects/CrazyMonitor_py2/:$PYTHONPATH

source ～/.bashrc 

pS：当然在/etc/enviroment  /etc/profile 下更改都行。

>>> import sys
>>> sys.path
['', '/home/zm/PycharmProjects/CrazyMonitor_py2', '/home/zm/xe6xa1x8cxe9x9dxa2', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-x86_64-linux-gnu', '/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/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages/PILcompat', '/usr/lib/python2.7/dist-packages/gtk-2.0', '/usr/lib/python2.7/dist-packages/ubuntu-sso-client']
---->添加成功，sys.path[0]是''，表示当前目录

方法二：

在客户端程序的bin文件夹下的主执行文件里添加：

import os
import sys

BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.append(BASE_DIR) 

print(os.path.abspath(__file__))
print(os.path.dirname(os.path.abspath(__file__)))
print(BASE_DIR)

print(sys.path)

---->执行结果：

/home/zm/PycharmProjects/save/bengle.py
/home/zm/PycharmProjects/save
/home/zm/PycharmProjects

[ '/home/zm/PycharmProjects/save', '/usr/lib/python2.7', '/usr/lib/python2.7/plat-x86_64-linux-gnu', '/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/lib/python2.7/dist-packages', '/usr/lib/python2.7/dist-packages/PILcompat', '/usr/lib/python2.7/dist-packages/gtk-2.0', '/usr/lib/python2.7/dist-packages/ubuntu-sso-client', '/home/zm/xe4xb8x8bxe8xbdxbd/pycharm-2018.2.3/helpers/pycharm_matplotlib_backend', '/home/zm/PycharmProjects']