[TOC] ## **問題：** 設置了Python的路徑，但啟動Python時總是報“ImportError:?No?module?named?site”這個錯誤。 ``` [root@tZ?game]#?echo?$PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin:/usr/lib/python2.7:.:/usr/lib/python2.7:/usr/lib/python2.7/site-packages:/usr/bin/python:/usr/lib64/python2.7 [root@tZ?game]#?echo?$PYTHONHOME /usr/bin/ [root@tZ?game]#?echo?$PYTHONPATH /usr/bin/ [root@tZ?game]#?whereis?python python:?/usr/bin/python?/usr/bin/python2.7?/usr/lib/python2.7?/usr/lib64/python2.7?/usr/include/python2.7?/usr/share/man/man1/python.1.gz [root@tZ?game]#?which?python /usr/bin/python ``` #-----------問題點----------- [root@tZ?game]#?python ImportError:?No?module?named?site ? #----------查看問題點相關----------- [root@tZ?game]#?find?/?-name?site.py /usr/lib64/python2.7/site.py ``` #---------當前錯誤情況下-v的顯示---------- [root@tZ etc]# python -v # installing zipimport hook import zipimport # builtin # installed zipimport hook ImportError: No module named site # clear __builtin__._ # clear sys.path # clear sys.argv # clear sys.ps1 #....更多信息未列出 ``` ``` #---------百度查看正常情況的-v顯示--------- # python -v #?installing?zipimport?hook? import?zipimport?#?builtin? #?installed?zipimport?hook? #?/usr/lib/python2.7/site.pyc?matches?/usr/lib/python2.7/site.py? import?site?#?precompiled?from?/usr/lib/python2.7/site.pyc #----------------差別之處 #?/usr/lib/python2.7/os.pyc?matches?/usr/lib/python2.7/os.py? import?os?#?precompiled?from?/usr/lib/python2.7/os.pyc? import?errno?#?builtin? import?posix?#?builtin? 看起來導入site時，還需要預編譯的site.pyc文件。 基本認定是模塊路徑問題，導致找不到導入庫模塊。 ``` ## **解決：** 查看Python路徑相關環境變量的意義。 PYTHONHOME：指定Python的標準庫。 PYTHONPATH：用于擴充Python查找模塊文件的路徑。 這里是導入site模塊時出錯，所以應該在PYTHONPATH上增加site模塊的路徑。 ``` 查找site相關文件的路徑： [root@tZ etc]# find / -name site.py* /usr/lib64/python2.7/site.pyc /usr/lib64/python2.7/site.py /usr/lib64/python2.7/site.pyo 增加路徑到環境變量： export PYTHONPATH=$PYTHONPATH:/usr/lib64/python2.7 檢查效果： [root@tZ etc]# python -v # installing zipimport hook import zipimport # builtin # installed zipimport hook # /usr/lib64/python2.7/site.pyc matches /usr/lib64/python2.7/site.py import site # precompiled from /usr/lib64/python2.7/site.pyc # /usr/lib64/python2.7/os.pyc matches /usr/lib64/python2.7/os.py 說明已經解決。 直接啟動Python試試： [root@tZ etc]# python Python 2.7.5 (default, Jun 17 2014, 18:11:42) [GCC 4.8.2 20140120 (Red Hat 4.8.2-16)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> 證實問題解決了。 ```