什么是Java的BigDecimal的Python？ [英] What is the python for Java's BigDecimal?

问题描述

在Java中，当我们计划金钱时，建议使用BigDecimal类来获得金钱。 python中有类似的东西吗？我想要一个可以有货币和汇率的面向对象的东西，这样做了吗？

我将钱存为美分整数（我认为），并将其乘以100来获得美元，但我也有外币，因此当物品有价格时，按价格排序的上市列表变得不方便不同的货币，甚至被列为每小时或每件产品的价格。所以理想情况下，如果定价是每小时或每件商品，我希望一个班级在python中拥有汇率，货币和定价类型。

所以我想我在找一个价格类，而不是 money class，是否有这样的事情？我正在编程的gae没有十进制数据类型，所以我可以使用一个表示分数的整数，或者像我自己实现的十进制表示那样创建一些东西。 java.math.BigDecimal 是 decimal.Decimal 。您甚至可以阅读文档了解更多信息。 mpmath 是一个用于多精度浮点运算的纯Python库。

In Java, when we program money it is recommended to use the class BigDecimal for money. Is there something similar in python? I would like something object-oriented that can have a currency and an exchange rate, has that been done?

I store money as integers of cents (I think) and multiply with 100 to get dollars but I also have foreign currency so listing listing ordered by price becomes inconvenient when articles have different currencies and even are listed as price per hour or per item. So ideally I would like a class for money in python that has exchange rate, currency and what type of pricing it is, if the pricing is per hour or per item.

So I suppose I'm looking for a priceclass and not a moneyclass, is there such a thing already? The gae I'm programming at doesn't have decimal data type so I can use an integer representing just the fraction or invent something like an own decimal representation where I implement it.

解决方案

The java.math.BigDecimal in Java's equivalent is decimal.Decimal in Python. You can even go through the documentation for more. mpmath is a pure-Python library for multi-precision floating-point arithmetic.

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