def validate_backup_window(window):
 hour = '[01]?[0-9]|2[0-3]'
 minute = '[0-5][0-9]'
 r = ('(?P<start_hour>%s):(?P<start_minute>%s)-(?P<end_hour>%s):(?P<end_minute>%s)' % (hour, minute, hour, minute))
 range_regex = re.compile(r)
 m = range_regex.match(window)
 if (not m):
  raise ValueError('DBInstance PreferredBackupWindow must be in the format: hh24:mi-hh24:mi')
 start_ts = ((int(m.group('start_hour')) * 60) + int(m.group('start_minute')))
 end_ts = ((int(m.group('end_hour')) * 60) + int(m.group('end_minute')))
 if (abs((end_ts - start_ts)) < 30):
  raise ValueError('DBInstance PreferredBackupWindow must be at least 30 minutes long.')
 return window

def validate_backup_window ( window ) : hour = '[01]?[0-9]|2[0-3]' minute = '[0-5][0-9]' r = ( '(?P<start_hour>%s):(?P<start_minute>%s)-(?P<end_hour>%s):(?P<end_minute>%s)' % ( hour , minute , hour , minute ) ) range_regex = re . compile ( r ) m = range_regex . match ( window ) if ( not m ) : raise ValueError ( 'DBInstance PreferredBackupWindow must be in the format: hh24:mi-hh24:mi' ) start_ts = ( ( int ( m . group ( 'start_hour' ) ) * 60 ) + int ( m . group ( 'start_minute' ) ) ) end_ts = ( ( int ( m . group ( 'end_hour' ) ) * 60 ) + int ( m . group ( 'end_minute' ) ) ) if ( abs ( ( end_ts - start_ts ) ) < 30 ) : raise ValueError ( 'DBInstance PreferredBackupWindow must be at least 30 minutes long.' ) return window
validate preferredbackupwindow for dbinstance .