mac使用easy_install安装pip时报错 ImportError: No module named extern
1.首先根据以下步骤安装pip:1.Installeasy_installcurlhttps://bootstrap.pypa.io/ez_setup.py-o-|sudopython2.Installpipsudoeasy_installpip3.Now,youcouldinstallexternalmodules.Forexamplepipinstallregex#Thisisonlyanex