json.loads在python中将小数点转换为'e'

Question

以下是我从服务器获取的回复

[{"type":"bid","price":0.00000026,"amount":737.15054457,"tid":200001915,"timestamp":1516036570}]

我正在尝试使用

将此字符串解析为JSON

json_data = json.loads (req.text)

但是，当我尝试使用json_data[0]['price']阅读“价格”时，输出为2.6e-07

我尝试将数据解析为json_data = json.loads (req.text, parse_float=Decimal)，但仍然没有区别。

Answer 1

这是python显示浮动的方式

price = 0.00000026
print(price)

输出：2.6e-07 如果你想看到它正常，你可以这样打印：

print('{0:.8f}'.format(price))

输出：0.00000026

Answer 2

Your value is parsed as a Decimal, it's just shown in an exponential form because it's more compact:

>>> x = json.loads('{"a":0.00000000000000026}', parse_float=decimal.Decimal)
>>> repr(x)
"{'a': Decimal('2.6E-16')}"

You can see that the precision is preserved, though, unlike with a float:

>>> x['a'] + 1
Decimal('1.00000000000000026')
>>> 1 + 2.6e-16
1.0000000000000002

So everything works as expected.