从正确性、边界处理、可读性和数据移动角度审查这条生成的惰性管道。
解析 order_id,amount,status 格式的 CSV 行，保留已付款记录，并返回金额总计与数量。
Python
from functools import reduce
def summarize_payments(lines):
cleaned = map(str.strip, lines)
rows = map(lambda line: line.split(","), cleaned)
paid_rows = filter(lambda row: row[2] == "paid", rows)
amounts = map(lambda row: float(row[1]), paid_rows)
def append_amount(acc, amount):
return acc + [amount]
paid_amounts = reduce(append_amount, amounts, [])
total = reduce(lambda acc, amount: acc + amount, paid_amounts)
return {
"total": round(total, 2),
"count": len(paid_amounts),
}
生成代码仅作示例，不代表任何特定模型