| 
  | __init__(self,
        excl_char='',
        incl_char=None,
        empty_ok=False,
        check=None)(Constructor)
 |  |  Note that 'excl_char' has higher priority (means that if a char is in 
  'excl_char', it will NOT be allowed to put into the field even though it 
  is in 'incl_char'). 
    Parameters:
        excl_char- A string containing the chars that will not be allowed to put 
          into the entry field.incl_char- A string containing the chars that will be allowed to put into 
          the entry field. 'incl_char' can be None, which means any char is
          allowed.Overrides:
        object.__init__
     |