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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 initial_global_state(self) -> GlobalState: """Initialize the execution environment."""

        environment = Environment(
            self.callee_account,
            self.caller,
            self.call_data,
            self.gas_price,
            self.call_value,
            self.origin,
            code=self.code or self.callee_account.code,
        )
        return super().initial_global_state_from_environment(
            environment, active_function="fallback"
        )