module 'urllib' has no attribute 'urlopen': AttributeError python reptile occurred while writing

First need to check their python environment is consistent with the package

Appears AttributeError: module 'urllib' has no attribute 'urlopen'
appears AttributeError: module 'urllib' has no attribute 'request'
which errors are introduced into the appropriate packet is related

Package in python3.X environment like this?

import urllib.request #导入的包是url.request

def getHtml(url):
    page = urllib.request.urlopen(url) #使用的方式是urllib.request.urlopen()
    html = page.read()
    return html

html = getHtml("http://www.baidu.com")

print (html)

Package is introduced url.request
method used is the urllib.request.urlopen ()

Package in python2.X environment like this?

import urllib #导入包为urllib 

def getHtml(url):
    page = urllib.urlopen(url) #使用方式urllib.urlopen
    html = page.read()
    return html

html = getHtml("http://www.baidu.com")

print html

Url package is introduced
manner using urllib.urlopen ()