Python 3.5 and 2.7 differentiate __python

1. Pickle Difference

In Python 2.7, the Dict object is stored serialized, and then free to serialize, with the following code in general:

However, when you invoke the above code in Python 3.5, you will report the following error:

This is the default for the 2.7pickle.load function read bytes read, while 3.5 read the default for ASCII read, the official website description is as follows:

So you just need to change the read format of the call to bytes.

Wind = pickle.load (pkl_file,encoding= ' bytes ')

2. URL access is different

In Python2.7, the request code for a URL is as follows:

Importurllib2
req = Urllib2. Request (' http://www.baidu.com ')
Response = Urllib2.urlopen (req)

Instead of using request in 3.5, the code is as follows:

From Urllibimportrequest

req = Request. Request (Req_url)

f= Request.urlopen (req)

And there is a more convenient way to access, you can avoid the lack of timely closure of the link, the code is as follows:

 from Import Request

 with  as F:

data = F.read ()

Print (' Status: ', F.status, F.reason)

 for  in F.getheaders ():

Print ('%s:%s '% (k, v))

Print (' Data: ', Data.decode (' Utf-8 '))

Access with AS: To automatically close links when page access is complete