#正则表达式替换
sss=re.sub('(\d+)/(\d+)/(\d+)','____',sss)
#正则表达式对应参数替换
sss=re.sub(r'(\d+)/(\d+)/(\d+)','\3-\1-\2',text)

匹配图片标签

img=re.search('<img([\u4e00-\u9fa5\w\s\_\-\"\=\/\:\?\+\%\&\.\;]*)>',ss)
print(img.group())
print(img.group(1))
s2=img.group(1)
img2=re.search('src="([\w\s\_\-\=\/\:\?\+\%\&\.\;]*)"',s2)   #匹配src="地址"
print(img2.group())
print(img2.group(1))
imgurl=img2.group(1)