Error:urllib.error.URLError: <urlopen error [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:xxx)>

Solution:
Add the following codes before you use urllib.request.Request(url):

import ssl
ssl._create_default_https_context = ssl._create_unverified_context

Problem analysis

This is because the website visited is HTTPS://, which requires SSL authentication, and using urllib directly will lead to local authentication failure (the specific reason is not found out), so SSL is used_create_unverified_Context turn off authentication

Error recurrence

When request = urllib.Request.Request (URL, data) is executed, an error is reported. Cancel the comments in the upper two lines to solve the problem

import json
import urllib


def baidu_search():
    url = "https://www.baidu.com/s?"
    data = {"wd": "AHA"}
    data = json.dumps(data).encode('GBK')
    # import ssl
    # ssl._create_default_https_context = ssl._create_unverified_context  # If these two lines are not added, the next line reports an error
    request = urllib.request.Request(url, data)
    response = urllib.request.urlopen(request)
    content = response.read()
    print(str(content))


if __name__ == '__main__':
    baidu_search()