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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 get_supported_currency_choices(api_key):
 	""" 	Pull a stripe account's supported currencies and returns a choices tuple of those supported currencies. 	:param api_key: The api key associated with the account from which to pull data. 	:type api_key: str 	"""

	import stripe

	stripe.api_key = api_key

	account = stripe.Account.retrieve()
	supported_payment_currencies = stripe.CountrySpec.retrieve(account["country"])[
		"supported_payment_currencies"
	]

	return [(currency, currency.upper()) for currency in supported_payment_currencies]