Can't connect to device with ampy while in virtualenv

[jgaehring]

Here's what happened when I tried:

(quahog) jamie@xps-13:~/Code/play/quahog-quickstart$ ampy -p /dev/ttyUSB0 ls
Traceback (most recent call last):
  File "/home/jamie/Code/play/quahog-quickstart/quahog/bin/ampy", line 11, in <module>
    sys.exit(cli())
  File "/home/jamie/Code/play/quahog-quickstart/quahog/local/lib/python2.7/site-packages/click/core.py", line 764, in __call__
    return self.main(*args, **kwargs)
  File "/home/jamie/Code/play/quahog-quickstart/quahog/local/lib/python2.7/site-packages/click/core.py", line 717, in main
    rv = self.invoke(ctx)
  File "/home/jamie/Code/play/quahog-quickstart/quahog/local/lib/python2.7/site-packages/click/core.py", line 1134, in invoke
    Command.invoke(self, ctx)
  File "/home/jamie/Code/play/quahog-quickstart/quahog/local/lib/python2.7/site-packages/click/core.py", line 956, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/home/jamie/Code/play/quahog-quickstart/quahog/local/lib/python2.7/site-packages/click/core.py", line 555, in invoke
    return callback(*args, **kwargs)
  File "/home/jamie/Code/play/quahog-quickstart/quahog/local/lib/python2.7/site-packages/ampy/cli.py", line 99, in cli
    _board = pyboard.Pyboard(port, baudrate=baud, rawdelay=delay)
  File "/home/jamie/Code/play/quahog-quickstart/quahog/local/lib/python2.7/site-packages/ampy/pyboard.py", line 147, in __init__
    raise PyboardError('failed to access ' + device)
ampy.pyboard.PyboardError: failed to access /dev/ttyUSB0

Installing ampy as a global did work... 🤔