The same code cannot pass in the Notepad environment (tested with Notepad), but can pass in Pycharm (Python3.5)
Code :

import urllib
import urllib.request
url = "http://www.baidu.com"
data = urllib.request.urlopen(url).read()
data = data.decode('UTF-8')

This statement can be passed in both environments

data.decode('gbk', 'ignore').encode('UTF-8')
print(data)

Display the crawled web page in Pycharm and display it in the cmd window

UnicodeEncodeError: 'gbk' codec can't encode character 'xbb' in position 26830:
illegal multibyte sequence

Invalid characters must be removed.

import urllib
import urllib.request
url = "http://www.baidu.com"
data = urllib.request.urlopen(url).read()
data.decode('gbk', 'ignore').encode('UTF-8')
print(data)

This is okay, please explain