相关疑难解决方法(0)

Python的sys.path在哪里初始化？

UPD:Python在引用PYTHONPATH之前添加了一些路径:

    >>> import sys
    >>> from pprint import pprint as p
    >>> p(sys.path)
    ['',
     'C:\\Python25\\lib\\site-packages\\setuptools-0.6c9-py2.5.egg',
     'C:\\Python25\\lib\\site-packages\\orbited-0.7.8-py2.5.egg',
     'C:\\Python25\\lib\\site-packages\\morbid-0.8.6.1-py2.5.egg',
     'C:\\Python25\\lib\\site-packages\\demjson-1.4-py2.5.egg',
     'C:\\Python25\\lib\\site-packages\\stomper-0.2.2-py2.5.egg',
     'C:\\Python25\\lib\\site-packages\\uuid-1.30-py2.5.egg',
     'C:\\Python25\\lib\\site-packages\\stompservice-0.1.0-py2.5.egg',
     'C:\\Python25\\lib\\site-packages\\cherrypy-3.0.1-py2.5.egg',
     'C:\\Python25\\lib\\site-packages\\pyorbited-0.2.2-py2.5.egg',
     'C:\\Python25\\lib\\site-packages\\flup-1.0.1-py2.5.egg',
     'C:\\Python25\\lib\\site-packages\\wsgilog-0.1-py2.5.egg',
     'c:\\testdir',
     'C:\\Windows\\system32\\python25.zip',
     'C:\\Python25\\DLLs',
     'C:\\Python25\\lib',
     'C:\\Python25\\lib\\plat-win',
     'C:\\Python25\\lib\\lib-tk',
     'C:\\Python25',
     'C:\\Python25\\lib\\site-packages',
     'C:\\Python25\\lib\\site-packages\\PIL',
     'C:\\Python25\\lib\\site-packages\\win32',
     'C:\\Python25\\lib\\site-packages\\win32\\lib',
     'C:\\Python25\\lib\\site-packages\\Pythonwin']

我的PYTHONPATH是:

    PYTHONPATH=c:\testdir

我想知道PYTHONPATH之前的那些路径来自哪里？