fix

Author: Jon Heaton

instagram/oauth2.py

@@ -124,7 +124,7 @@ def _generate_sig(self, endpoint, params, secret):
         sig = endpoint
         for key in sorted(params.keys()):
             sig += '|%s=%s' % (key, params[key])
-        return hmac.new(secret, sig, sha256).hexdigest()
+        return hmac.new(secret.encode(), sig.encode(), sha256).hexdigest()
 
     def url_for_get(self, path, parameters):
         return self._full_url_with_params(path, parameters)