在Python中,从已排序的事务列表计算余额可以通过以下步骤实现:
以下是一个示例代码:
transactions = [
{"date": "2022-01-01", "amount": 100, "type": "income"},
{"date": "2022-01-02", "amount": 50, "type": "expense"},
{"date": "2022-01-03", "amount": 200, "type": "income"},
{"date": "2022-01-04", "amount": 80, "type": "expense"}
]
balance = 0
for transaction in transactions:
if transaction["type"] == "income":
balance += transaction["amount"]
elif transaction["type"] == "expense":
balance -= transaction["amount"]
print("余额:", balance)
在这个示例中,我们假设事务列表已经按日期排序。根据事务的类型和金额,我们更新余额变量。最后,打印出计算得到的余额。
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