Digital certificates (commonly known as CA certificates, hereinafter referred to as CA certificates) provide electronic authentication for achieving secure communication between the two parties. In the Internet, company intranet or extranet, digital certificates are used to realize identity recognition and electronic information encryption. The digital certificate contains the identification information of the owner of the key pair (public key and private key), and the identity of the certificate holder is authenticated by verifying the authenticity of the identification information.
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At present, major websites basically have their own CA certificates, but it is not ruled out that some websites do not purchase CA certificates in order to save website construction costs. And because the requests module will verify the CA certificate by default when sending network requests. If the current website does not have a CA certificate, the following error will be reported:
If the above error occurs, then we can use the verify keyword parameter to not verify the CA certificate of the website when requesting
response = requests.get( "url"，verify=False)
If you add the keyword parameter verify=False, a warning will pop up when you use the requests module to send a request, warning you that the current request may be unsafe, as shown in the following figure:
This warning has no effect on the code logic behind. If you have obsessive-compulsive disorder, you can consider adding the following code to ignore the warning:
import urllib3
urllib3.disable_warnings()