Added workaround for pymysql3 double wrapping ProgrammingErrors to pymysql dialect.

Added workaround for pymysql3 return a bytes object when queried for isolation level.

1 files changed, 12 insertions, 0 deletions

diff --git a/lib/sqlalchemy/dialects/mysql/pymysql.py b/lib/sqlalchemy/dialects/mysql/pymysql.py
index d70e997f7..25e2dadd3 100644
--- a/lib/sqlalchemy/dialects/mysql/pymysql.py
+++ b/lib/sqlalchemy/dialects/mysql/pymysql.py
@@ -28,9 +28,21 @@ class MySQLDialect_pymysql(MySQLDialect_mysqldb):
     driver = 'pymysql'
 
     description_encoding = None
+    # Py3K
+    #supports_unicode_statements = True
+    # Py2K
+    # end Py2K
 
     @classmethod
     def dbapi(cls):
         return __import__('pymysql')
 
+    # Py3K
+    #def _extract_error_code(self, exception):
+    #    if isinstance(exception.args[0], Exception):
+    #        exception = exception.args[0]
+    #    return exception.args[0]
+    # Py2K
+    # end Py2K
+
 dialect = MySQLDialect_pymysql