Python 3.5 and 2.7 differentiate __python

Source: Internet
Author: User

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:

req = Urllib2. Request (' ')
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 = ()
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

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