Plot.ly Python Setup Fail at the Beginning

Hello!

I just installed plot.ly and when I am trying to do the next step, which is using your credential: username and API code, I keep getting an error.

Ive typed in :
$ plotly.tools.set_credentials_file(username=username, api_key=apikey)
However I keep getting the error:

-bash: syntax error near unexpected token `username=username,’

I am following along the Getting Started Guide