code cleanup

service/prereqsCheck.py

@@ -5,9 +5,11 @@ import platform
 
 version_block = ''
 
+
 class PreCheckException(Exception):
     pass
 
+
 class PreCheckMessage():
     def __init__(self, msg):
         # wx may not be installed, in which case print to console. For all other prechecks, should pop up a MessageDialog
@@ -21,6 +23,7 @@ class PreCheckMessage():
         finally:
             print(msg)
 
+
 def version_precheck():
     global version_block
 
@@ -80,4 +83,4 @@ def version_precheck():
         version_block += "\nDateutil version: {}".format(dateutil.__version__)
     except:
         msg = "pyfa requires the python-dateutil module. You can download python-dateutil form https://pypi.python.org/pypi/python-dateutil"
-        raise PreCheckException(msg)
+        raise PreCheckException(msg)