--- msrplib/digest.py.orig	2017-09-29 19:26:59 UTC
+++ msrplib/digest.py
@@ -6,7 +6,7 @@ from base64 import b64encode, b64decode
 import random
 
 def get_random_data(length):
-    return ''.join(chr(random.randint(0, 255)) for x in xrange(length))
+    return ''.join(chr(random.randint(0, 255)) for x in range(length))
 
 class LoginFailed(Exception):
     pass
@@ -28,7 +28,7 @@ def calc_hash(**parameters):
     return md5(hash_text).hexdigest()
 
 def calc_responses(**parameters):
-    if parameters.has_key("ha1"):
+    if "ha1" in parameters:
         ha1 = parameters.pop("ha1")
     else:
         ha1 = calc_ha1(**parameters)
@@ -80,7 +80,7 @@ class AuthChallenger(object):
             nonce = parameters["nonce"]
             opaque = parameters["opaque"]
             response = parameters["response"]
-        except IndexError, e:
+        except IndexError as e:
             raise LoginFailed("Parameter not present: %s", e.message)
         try:
             expected_response, rspauth = calc_responses(ha1 = ha1, **parameters)
--- msrplib/session.py.orig	2020-02-07 08:31:31 UTC
+++ msrplib/session.py
@@ -120,7 +120,7 @@ class MSRPSession(object):
                 chunk = self.msrp.make_send_request()
                 chunk.add_header(protocol.MSRPHeader('Keep-Alive', 'yes'))
                 self.deliver_chunk(chunk)
-            except MSRPTransactionError, e:
+            except MSRPTransactionError as e:
                 if e.code == 408:
                     self.msrp.loseConnection(wait=False)
                     self.set_state('CLOSING')
@@ -237,7 +237,7 @@ class MSRPSession(object):
                 if item is None:
                     break
                 self._write_chunk(item.chunk, item.response_callback)
-        except ConnectionClosedErrors + (proc.LinkedExited, proc.ProcExit), e:
+        except ConnectionClosedErrors + (proc.LinkedExited, proc.ProcExit) as e:
             self.logger.debug('writer: exiting because of %r' % e)
         except:
             self.logger.exception('writer: captured unhandled exception:')
--- msrplib/transport.py.orig	2020-02-07 08:31:31 UTC
+++ msrplib/transport.py
@@ -46,7 +46,7 @@ class MSRPNoSuchSessionError(MSRPTransactionError):
     comment = 'No such session'
 
 
-data_start, data_end, data_write, data_final_write = range(4)
+data_start, data_end, data_write, data_final_write = list(range(4))
 
 
 def make_report(chunk, code, comment):
@@ -244,7 +244,7 @@ class MSRPTransport(GreenTransportBase):
         """Generate and write the response, lose the connection in case of error"""
         try:
             response = make_response(chunk, code, comment)
-        except ChunkParseError, ex:
+        except ChunkParseError as ex:
             log.error('Failed to generate a response: %s' % ex)
             self.loseConnection(wait=False)
             raise