fix(init): Only log exceptions when python version is 3 or higher

Author: chriswmackey

ladybug/__init__.py

@@ -7,6 +7,7 @@
 
 import importlib
 import pkgutil
+import sys
 
 # set up the logger
 logger = get_logger(__name__)
@@ -20,6 +21,7 @@
     try:
         extensions[name] = importlib.import_module(name)
     except Exception:
-        logger.exception('Failed to import {0}!'.format(name))
+        if (sys.version_info >= (3, 0)):
+            logger.exception('Failed to import {0}!'.format(name))
     else:
         logger.info('Successfully imported Ladybug plugin: {}'.format(name))

ladybug/analysisperiod.py

@@ -477,7 +477,7 @@ def __repr__(self):
              self.timestep)
 
     def __key(self):
-        return(self.st_time, self.end_time, self.timestep, self.is_leap_year)
+        return (self.st_time, self.end_time, self.timestep, self.is_leap_year)
 
     def __hash__(self):
         return hash(self.__key())