I'm looking for a way to pad the float decimals with zeros:

This one is my reference:

In [37]: '{:5.5}'.format(round(4.123456, 5))

Out[37]: '4.1235'

I have this:

In [38]: '{:5.5}'.format(4.1)

Out[38]: ' 4.1'

But I would like to have this:

Out[38]: '4.1000'

解決方案

To format a floating point number with a given precision you should use the 'f' specifier. Without it the value is formatted as a string.

>>> '{:.4f}'.format(4.1)

'4.1000

You can also specify the minimum width of the complete output and the fill character:

>>> '{:07.4f}'.format(4.1)

'04.1000'

Here the output is padded on the left with zeros to be at least 7 characters.

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