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23 lines
653 B
Python
23 lines
653 B
Python
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accounts = []
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def transfer(source: int, destination: int, amount: int) -> None:
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source_account = get_account(source)
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update_account(source_account, -amount)
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destination_account = get_account(destination)
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update_account(destination_account, amount)
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def get_account(number: int) -> dict:
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return list(filter(lambda account: account['number'] == number, accounts))[0]
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def update_account(account: int, delta: int) -> None:
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account['balance'] += delta
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if __name__ == '__main__':
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accounts.append({'number': 1, 'balance': 100})
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accounts.append({'number': 2, 'balance': 200})
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transfer(1, 2, 50)
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print(accounts)
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