import urllib2,urllib,os
def Url1(url,files):#
    try:
        url=urllib2.urlopen(url)
    except:
        return ‘error‘
    fp=file(files,‘w+‘)
    fp1=url.read()
    fp.write(fp1)
    fp.close()
    url.close()
url=‘https://docs.python.org/2.7/tutorial/index.html‘
Url1(url,r‘g:\\pic\%s.html‘%(url.endswith(‘html‘)))

python单个文件