GetBalance TypeError

[aadon94]

I'm calling api.getbalance('BTC') but it complains saying:

hmac.py", line 144, in new
return HMAC(key, msg, digestmod)
raise TypeError("key: expected bytes or bytearray, but got %r" % type(key).name)
TypeError: key: expected bytes or bytearray, but got 'str'

I've tried changing 'BTC' to bytes with:
x = 'BTC'.encode() and passing that in but same error. Any help would be appreciated.

[aadon94]

Found the solution, believe it's an issue with Python 3:
Change signature = hmac.new(self.secret, url, hashlib.sha512).hexdigest()
to
signature = hmac.new(self.secret.encode('utf-8'), url.encode('utf-8'), hashlib.sha512).hexdigest()
in the bittrex.py file