Reputation: 41
Could not find a version that satisfies the requirement Flask pip install -U Flask
Collecting Flask Could not fetch URL https://pypi.python.org/simple/flask/: There was a problem confirming the ssl certificate: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590) - skipping
Could not find a version that satisfies the requirement Flask (from versions: )
No matching distribution found for Flask
Upvotes: 4
Views: 1735
Reputation: 170390
This is cause by flakiness in PYPI CDN, which was migrated mid April 2018.
We still encounter these problems every day, probably in 1% of builds.
I tried to get an ack on #pypi irc channel but getting the issue confirmed is still a TODO.
Upvotes: 1