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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

Arnab
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siddhant136
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    Possible duplicate of [pip install fails with "connection error: \[SSL: CERTIFICATE\_VERIFY\_FAILED\] certificate verify failed (\_ssl.c:598)"](https://stackoverflow.com/questions/25981703/pip-install-fails-with-connection-error-ssl-certificate-verify-failed-certi) – Adonis Apr 10 '18 at 12:22
  • Possible duplicate of [Not able to install python packages \[SSL: TLSV1\_ALERT\_PROTOCOL\_VERSION\]](https://stackoverflow.com/questions/49768770/not-able-to-install-python-packages-ssl-tlsv1-alert-protocol-version) – Anupam Apr 14 '18 at 05:13

1 Answers1

4

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
Night Crawler
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