(self, value=None)
return self.is_constant(STRING, value)
Test whether the formula is a String constant.

        Optionally, check that the constant has the given value.
Test whether the formula is a String constant.
Test whether the formula is a String constant .
def is_string_constant(self, value=None):
        """Test whether the formula is a String constant.

        Optionally, check that the constant has the given value.
        """
        return self.is_constant(STRING, value)
def is_string_constant ( self , value = None ) : return self . is_constant ( STRING , value )