Merge pull request datastax#995 from datastax/python-944_add-profile-name-to-warning

Python 944 add profile name to warning

Author: mambocab

CHANGELOG.rst

@@ -8,6 +8,7 @@ Bug Fixes
 * Non-ASCII characters in schema break CQL string generation (PYTHON-1008)
 * Fix OSS driver's virtual table support against DSE 6.0.X and future server releases (PYTHON-1020)
 * ResultSet.one() fails if the row_factory is using a generator (PYTHON-1026)
+* Log profile name on attempt to create existing profile (PYTHON-944)
 
 Other
 -----

cassandra/cluster.py

@@ -1058,7 +1058,7 @@ def add_execution_profile(self, name, profile, pool_wait_timeout=5):
         if self._config_mode == _ConfigMode.LEGACY:
             raise ValueError("Cannot add execution profiles when legacy parameters are set explicitly.")
         if name in self.profile_manager.profiles:
-            raise ValueError("Profile %s already exists")
+            raise ValueError("Profile {} already exists".format(name))
         contact_points_but_no_lbp = (
             self._contact_points_explicit and not
             profile._load_balancing_policy_explicit)