Python的sys.path是从哪里初始化的?
Python的sys.path是从哪里初始化的? 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?