将Decimal(str(value))传递给字典以获取原始值 [英] Passing a Decimal(str(value)) to a dictionary for raw value

问题描述

我需要将值作为类'decimal.Decimal'传递给字典，并且不断发生以下情况:

I'm needing to pass values to a dictionary as class 'decimal.Decimal', and the following keeps happening:

from decimal import *

transaction_amount = 100.03
transaction_amount = Decimal(str(transaction_amount))
item = {
'transaction_amount': transaction_amount
}

print(item)

结果:

{'transaction_amount': Decimal('100.03')}

如何获得原始的100.03结果，而不是Decimal('100.03')?

How do I attain the raw 100.03 result, rather than Decimal('100.03')?

这是我要保存的词典:

{'transaction_amount': 100.03)}

当我这样做时:

print(transaction_amount)

结果符合预期:

100.03

那么我要去哪里错了?

So where am I going wrong?

我认为这个问题应该被否决.

I don't see any reason why this question should be downvoted.

推荐答案

当您要求python打印对象时，它将打印该对象的文本表示形式.

When you ask python to print an object, it'll print the textual representation of that object.

这里的可变项是字典，因此其表示形式如下:

Here your variable item is a dictionnary, so its representation is as follow:

{ key: value [, repeat]}

如果要在字典中输入值，则必须按如下所示进入指定的键:

If you want the value inside your dictionnary, you would have to go at the specified key like so :

print(item[transaction_amount])

因此，基本上，您的代码很好，也使用了十进制，但是您并不是在测试它的好方法. ;)发生了很多.

So basically, your code was fine and your use of decimal too, but you weren't testing it the good way. ;) Happens a lot.

修改: 值得注意的是，由于在字典对象中得到的是Decimal(100.03)，即使像我之前显示的那样打印键-值对的值，也不会得到纯100.03，但可能会得到Decimal(100.03).

It's worth noting that, since what you are getting within the dictionnary object is Decimal(100.03), even when printing the value of the key-value pair as I showed previously, you won't get a pure 100.03, but probably Decimal(100.03).

我将搜索有关如何获取字符串的一些文档. Welp显然不，它应该像一种魅力.

I'll search some documentation as to how to get the string. Welp apparently no, it should work like a charm.

我没有正确地回答问题(此后已对其进行编辑).
但是，由于注释部分中的对话很长时间，因此将保留在此处.

I didn't get the question (which has been edited since then) right.
However because of the extended conversation in the comment section, it'll remain here.

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