@av._output_format<EOL><INDENT>@av._call_api_on_func<EOL>def get_currency_exchange_rate(self, from_currency, to_currency):<DEDENT>
_FUNCTION_KEY = '<STR_LIT>'<EOL>return _FUNCTION_KEY, '<STR_LIT>', None<EOL>
Returns the realtime exchange rate for any pair of physical
        currency (e.g., EUR) or physical currency (e.g., USD).

        Keyword Arguments:
            from_currency: The currency you would like to get the exchange rate
            for. It can either be a physical currency or digital/crypto currency.
            For example: from_currency=USD or from_currency=BTC.
            to_currency: The destination currency for the exchange rate.
            It can either be a physical currency or digital/crypto currency.
            For example: to_currency=USD or to_currency=BTC.