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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def validate(self):
 """Validate that the TernaryConditional is correctly representable."""

        if not isinstance(self.predicate, Expression):
            raise TypeError(u'Expected Expression predicate, got: {} {}'.format(
                type(self.predicate).__name__, self.predicate))
        if not isinstance(self.if_true, Expression):
            raise TypeError(u'Expected Expression if_true, got: {} {}'.format(
                type(self.if_true).__name__, self.if_true))
        if not isinstance(self.if_false, Expression):
            raise TypeError(u'Expected Expression if_false, got: {} {}'.format(
                type(self.if_false).__name__, self.if_false))