正则过滤字符串中的数字

import re

arg = "jing4 gong1 sang1 zi3"

arg_count =  arg.count(" ")
patten ="([a-z]*)\d\s?"*(arg_count+1)
print patten
arg_compile = re.compile(patten)

match_obj = arg_compile.search(arg)

print match_obj.groups()