如何在 Python 中以精确的精度打印双精度值?
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How do I print double in Python with exact precision?
提问by ALEXANDER KONSTANTINOV
I need to print double with precision equal exactly to 6, I found function round:
我需要以精确等于 6 的精度打印 double,我发现函数round:
print(str(round(result, 6))
But in case resultitself has less precision, the print function skips zeros at the end.
但是如果结果本身的精度较低,打印函数会在最后跳过零。
Gor example, the output of such code,
Gor 例子,这样的代码的输出,
print(str(round(4.0, 6)))
is
是
4.0
But what I need is
但我需要的是
4.000000
How can I reach this?
我怎样才能达到这个目标?
回答by Matthew
Try using a format string:
尝试使用格式字符串:
print("%.6f"%4.0) # 4.000000
Or alternatively:
或者:
print("{:.6f}".format(4.0))
See the Python documentationfor details on format strings and more examples.
有关格式字符串和更多示例的详细信息,请参阅Python 文档。