>>> from urllib.parse import *
>>> url = 'http://map.baidu.com/?newmap=1&s=con%26wd%3D阿坝师范高等专科学校%26c%3D185&from=alamap&tpl=mapdots'
>>> import string
>>> quote(url, safe=string.printable)                                                                                                                  
'http://map.baidu.com/?newmap=1&s=con%26wd%3D%E9%98%BF%E5%9D%9D%E5%B8%88%E8%8C%83%E9%AB%98%E7%AD%89%E4%B8%93%E7%A7%91%E5%AD%A6%E6%A0%A1%26c%3D185&from=alamap&tpl=mapdots'

First unquote and then quote will be fine.

import urllib
print urllib.quote_plus( urllib.unquote_plus( "http://map.baidu.com/?newmap=1&s=con%26wd%3D阿坝师范高等专科学校%26c%3D185&from=alamap&tpl=mapdots" ) )

import urllib

base_Url = "http://map.baidu.com/?newmap=1&s=con%26wd%3D"
cn_Url= urllib.parse.quote("阿坝师范高等专科学校")
final_Url = base_Url+cn_Url+"%26c%3D185&from=alamap&tpl=mapdots"