No matching distribution found for plotly

Apologies, because I am a complete newbie. I am trying to add plotly to my modules and I am having an issue.
I typed pip install plotly into my command window and received the following

Collecting plotly
Could not fetch URL https://pypi.python.org/simple/plotly/: There was a problem confirming the ssl certificate: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed (_ssl.c:645) - skipping
Could not find a version that satisfies the requirement plotly (from versions: )
No matching distribution found for plotly

I haven’t found any thing that shows me how to fix this. help appreciated.