如何在Python中将字符串转换为双精度？

内容隐藏

问题：如何在Python中将字符串转换为双精度？

我想知道如何将包含数字的字符串转换为双精度型。

I would like to know how to convert a string containing digits to a double.

>>> x = "2342.34"
>>> float(x)
2342.3400000000001

妳去使用float（其行为类似于C，C ++或Java double，并且具有相同的精度）。

>>> x = "2342.34"
>>> float(x)
2342.3400000000001

There you go. Use float (which behaves like and has the same precision as a C,C++, or Java double).

十进制运算符可能更符合您的要求：

>>> from decimal import Decimal
>>> x = "234243.434"
>>> print Decimal(x)
234243.434

The decimal operator might be more in line with what you are looking for:

>>> from decimal import Decimal
>>> x = "234243.434"
>>> print Decimal(x)
234243.434

请注意，如果您的字符串数字包含的有效位数超过15个，float(s)则将其取整。在这种情况下，最好使用Decimal

Be aware that if your string number contains more than 15 significant digits float(s) will round it.In those cases it is better to use Decimal

声明：本站所有文章，如无特殊说明或标注，均为本站原创发布。任何个人或组织，在未征得本站同意时，禁止复制、盗用、采集、发布本站内容到任何网站、书籍等各类媒体平台。如若本站内容侵犯了原著者的合法权益，可联系我们进行处理。