Sprintly doesn't work in a virtualenv with Python 3

[particledecay]

The sprintly command is installed globally in /usr/local/bin/sprintly, but within virtualenvs that use Python 3 (which is almost all of them for me these days), the command doesn't work at all.

$ sprintly --install-hook
  File "/usr/local/bin/sprintly", line 154
    print 'Downloading latest version of sprintly from GitHub...'
                                                                ^
SyntaxError: Missing parentheses in call to 'print'