Python2 转Python3

1. 工具命令

* python2 * python/pip/pydoc * python3 * python3/pip3/pydoc3

2. 语法

1. exception

   python3 try # code here except KeyError as e: pass 

2. print

   python2: print "abc" python3: print("abc") 

3. urllib

   python3统一了 urllib 和urllib2

   python2 : import urllib ,urllib2 python3 : import urllib import urllib.parse, urllib.request urllib.parse.urlenc