31 lines
880 B
Python
31 lines
880 B
Python
"""金额换算：禁止 float 参与元/分转换（避免 2.01 元变成 200 分）。"""
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from decimal import Decimal, InvalidOperation, ROUND_HALF_UP
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TWO_PLACES = Decimal('0.01')
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ONE_FEN = Decimal('1')
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def to_decimal(amount) -> Decimal:
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if amount is None:
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return Decimal('0')
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if isinstance(amount, Decimal):
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return amount
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try:
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return Decimal(str(amount))
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except (InvalidOperation, ValueError, TypeError):
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return Decimal('0')
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def quantize_yuan(amount) -> Decimal:
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return to_decimal(amount).quantize(TWO_PLACES, rounding=ROUND_HALF_UP)
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def yuan_to_fen(amount) -> int:
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"""人民币元 → 微信支付整数分（四舍五入到分）。"""
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fen = quantize_yuan(amount) * 100
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return int(fen.quantize(ONE_FEN, rounding=ROUND_HALF_UP))
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def format_yuan(amount) -> str:
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return f'{quantize_yuan(amount):.2f}'
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