python3.x above crawler use problem Urllib (cannot use URLLIB2)

Question one: Python 3.x or above includes URLLIB2, integrating URLLIB2 and Urllib.

and introduce the module into one, only import urllib

# import urllib# Import urllb2# Correct use of import urllib

　　

　　So you cannot use the Urllib2.urlopen () method, or you will get an error without this module.

Nameerror:name ' URLLIB2 ' is not defined

　　

3.x or above version # Urllib2.open not available, use Urllib.request module instead of URLLIB2

1 Import urllib.request 2 3 response = Urllib.request.urlopen (' http//www.baidu.com')

Problem Two: variable name cannot be the same as introducing module name method, otherwise it will cause an error

　　

1 Importurllib.request2 3 #wrong wording4 5Request = Urllib.request.urlopen ('/HTTPwww.baidu.com')6 7 #otherwise TypeError: ' Module ' object is not callable8 9 #correct wordingTen  OneRQS = Urllib.request.urlopen ('/HTTPwww.baidu.com')

Issue four print output issues

　　The 3.x version of print has become a method of outputting anything that needs to be included in () brackets, or there will be a problem

The first step of the initial approach to crawl Baidu home

1 Import urllib.request 2 3 RQS = Urllib.request.urlopen ('http://www.baidu.com')4 5 html = rqs.read ()67print(HTML)

python3.x above crawler use problem Urllib (cannot use URLLIB2)