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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 _bracket_exact_var(self, symbol):
 """Checks local first and then module global variables for an exact match to the specified symbol name."""

        if isinstance(self.element, Executable):
            if symbol in self.element.parameters:
                return self.element.parameters[symbol]            
            if symbol in self.element.members:
                return self.element.members[symbol]

        if symbol in self.element.module.members:
            return self.element.module.members[symbol]

        return None