python编程注意点几则

1. 如何实现HTTPS链接？

#function: https connection test example#input: user:     user name#       password: the user login password#       host:     the host name #output: none#return: the result description def user_login(hostname, user, password):    conns = httplib.HTTPSConnection(hostname, 443)    strMethod = '/secret/login/cs?password=' + password + '&username=' + user    conns.request('GET',  strMethod,                             headers = {host,                                     "User-Agent": "User-Agent: Mozilla/4.0 (compatible; MS IE 6.0; EIS iPanel 2.0;(ziva))",                                     "Accept-language":"zh-cn",                                     "Accept-Encoding":"gzip, deflate",                                     "Accept": "application/xml",                                     "Connection": "keep-alive"})    res_s = conns.getresponse()    status = res_s.status    ret = res_s.read()    print 'ret: ', ret    if( status != 200 ):        print 'status: ', status        return ''    else:        return ret    conns.close()

如果字符串有UTF-8中文字符，如何写入文件？

错误的写法：

#function: test file write#input: file_name: the file name#       strWrite:  the written string#output: none#return: nonedef test_file_write(file_name, strWrite)   stream_file = file(file_name, 'w')   stream_file.write(strWrite)   stream_file.close()

正确的写法：

#function: test file write#input: file_name: the file name#       strWrite:  the written string#output: none#return: noneimport codecsdef test_file_write(file_name, strWrite)   stream_file = codecs.open(file_name, 'w', 'UTF-8')   stream_file.write(strWrite)   stream_file.close()

3. HTTP请求中有特殊字符，如何发送HTTP请求？

#function: test http request when the request includes special characters#input: host: the host name#       user: the user name#       password: the user login password#       verification: the verfication codes#output: none#return: none def test_http_connection(hostname, user, password, verification):    conns = httplib.HTTPSConnection(hostname, 443)    # error coding    # strMethod = 'secret/login/cs?username=' + user + '&password=' + password + '&verify_code=' + verification    strMethod = 'secret/login/cs?' + urllib.urlencode({'username':user, 'password':password, 'verify_code':verification})    print 'method: ', strMethod    conns.request('GET',  strMethod,                             headers = {"Host": hostname,                                     "User-Agent": "User-Agent: Mozilla/4.0 (compatible; MS IE 6.0; EIS iPanel 2.0;(ziva))",                                     "Accept-language":"zh-cn",                                     "Accept-Encoding":"gzip, deflate",                                     "Accept": "application/xml",                                     "Connection": "keep-alive"})    res_s = conns.getresponse()    status = res_s.status    ret = res_s.read()    print 'ret: ', ret    conns.close()