python实现一句话全部反转，单词不反转

#encoding=utf-8

def recersal(content):

    x=0

    y=[]

    n3=[]

    word_content=re.findall(r"\w*[!.,?]*",content)

    n1=[i for i in range(len(word_content)) if word_content[i]!=""]

    n2=[len(i) for i in word_content if i !=""]

    z=n2[0]-1

    for i in range(len(n1)-1):

        n3.append(n1[i+1]-n1[i]-1)

        z+=n2[i+1]-1

    n3.append(len(content)-z-n1[-1]-1)

    for i in range(len(n1)):

        if n1[0]==0:

            y.append(content[x:x+n2[i]])

            y.append(content[x+n2[i]:x+n2[i]+n3[i]])

            x=x+n2[i]+n3[i]

    return y

if __name__=="__main__":

    import re

    import time

    time1=time.time()

    content="asd dssdf tyrt, asdf!!!"

    result=recersal(content)

    result.reverse()

    print content

    print "".join(result)

    print "_"*20

    print u"程序耗时%s" % str(time.time()-time1)

    print "_"*20