Problem Description
PS C:\temp> python -m pip install --upgrade pip
WARNING: Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1108)'))': /simple/pip/
WARNING: Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1108)'))': /simple/pip/
WARNING: Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1108)'))': /simple/pip/
WARNING: Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1108)'))': /simple/pip/
ERROR: Operation cancelled by user
Could not fetch URL https://pypi.org/simple/pip/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.org', port=443): Max retries exceeded with url: /simple/pip/ (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: self signed certificate in certificate chain (_ssl.c:1108)'))) - skipping
solution
1. Temporary solution
Add optional commands when trusting pip install --trusted-host pypi.org, only valid for a single installation
Trust official website link:python -m pip install --upgrade pip --trusted-host pypi.org --trusted-host files.pythonhosted.org
Temporarily use the mirror:pip install pillow -i http://pypi.douban.com/simple/ --trusted-host pypi.douban.com
The following three are recommended:
--trusted-host pypi.python.org
--trusted-host files.pythonhosted.org
--trusted-host pypi.org
2. Persistent solutions
It is uncomfortable to input such a long command every time. Let’s talk about the solution under windows computer.
win+EOpen the file browser, enter in the address bar, %APPDATA%it will open the roming folder, enter the pip folder, if not, create a new one, create a new pip.inifile, enter The following content
[global]
timeout = 6000
index-url=http://mirrors.aliyun.com/pypi/simple/
[install]
trusted-host = pypi.python.org
pypi.org
files.pythonhosted.org