Errors while installing on Mac

[ruthcmoratagil]

I just ran "sudo python setup.py install" on my Mac (El Capitan, 2013). At some point I got these errors. I am really not familiar with this and I am quite lost. Any clues?

Installed /Library/Python/2.7/site-packages/powerline_shell-0.7.0-py2.7.egg
Processing dependencies for powerline-shell==0.7.0
Searching for argparse
Reading https://pypi.python.org/simple/argparse/
Download error on https://pypi.python.org/simple/argparse/: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590) -- Some packages may not be found!
Couldn't find index page for 'argparse' (maybe misspelled?)
Scanning index of all packages (this may take a while)
Reading https://pypi.python.org/simple/
Download error on https://pypi.python.org/simple/: [SSL: TLSV1_ALERT_PROTOCOL_VERSION] tlsv1 alert protocol version (_ssl.c:590) -- Some packages may not be found!
No local packages or download links found for argparse
error: Could not find suitable distribution for Requirement.parse('argparse')