Error in downloading flask package in python using pip

Question

I am trying to install flask in python3. On giving the command python -m pip install flask, I get the error

Retrying (Retry(total=4, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:748)'),)': /simple/flask/ Retrying (Retry(total=3, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:748)'),)': /simple/flask/ Retrying (Retry(total=2, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:748)'),)': /simple/flask/ Retrying (Retry(total=1, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:748)'),)': /simple/flask/ Retrying (Retry(total=0, connect=None, read=None, redirect=None, status=None)) after connection broken by 'SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:748)'),)': /simple/flask/ Could not fetch URL https://pypi.python.org/simple/flask/: There was a problem confirming the ssl certificate: HTTPSConnectionPool(host='pypi.python.org', port=443): Max retries exceeded with url: /simple/flask/ (Caused by SSLError(SSLError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:748)'),)) - skipping Could not find a version that satisfies the requirement flask (from versions: ) No matching distribution found for flask

Possible duplicate of pip install fails with "connection error: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:598)" — Adonis
Possible duplicate of Not able to install python packages [SSL: TLSV1_ALERT_PROTOCOL_VERSION] — Anupam

Night Crawler Night Crawler · Accepted Answer · 2018-05-09T18:41:27

Here is the working solution:

python -m pip install --trusted-host pypi.python.org --trusted-host files.pythonhosted.org --trusted-host pypi.org --upgrade pip

You can install any pkg replacing "--upgrade pip".

For the permenant solution, you need to edit pip.ini file and add following:

[global]
trusted-host=
    pypi.python.org
    pypi.org
    files.pythonhosted.org

Error in downloading flask package in python using pip

1 Answers