import instead overload classes

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@19045 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/patches/DateTimePatch.py

@@ -28,22 +28,12 @@
 
 from DateTime import DateTime as DateTimeKlass
 import math
-from DateTime.DateTime import _calcSD, _calcDependentSecond, _calcYMDHMS, getDefaultDateFormat, _correctYear, _calcHMS, _calcDependentSecond2
+from DateTime.DateTime import _calcSD, _calcDependentSecond, _calcYMDHMS,\
+getDefaultDateFormat, _correctYear, _calcHMS, _calcDependentSecond2, DateTimeError,\
+SyntaxError, DateError, TimeError
 
 STATE_KEY = 'str'
 
-class DateTimeError( Exception ):
-    pass
-
-class SyntaxError( DateTimeError ):
-    pass
-
-class DateError( DateTimeError ):
-    pass
-
-class TimeError( DateTimeError ):
-    pass
-
 def DateTime__setstate__(self, state):
   if isinstance(state, tuple):
     t, tz = state