CODEWITHSUNDEEP
pythontimefloating-pointformat
DRauch
DRauch

Reputation: 57

Python3.x: Format Float to 2 Digits, Limit to 3 Decimal places

I have seen many questions about formatting floats and limiting decimal places, but I have not seen both done at once. I want the values for my variable seconds to always be represented as SS.mmm.

I have

t = int(input('time?: '))
seconds = (t / 1000) % 60
minutes = (t // (1000 * 60)) % 60
hours = (t // (1000 * 60 * 60)) % 24

I want to print hours, minutes, and seconds so that it will always follow HH:MM:SS.mmm

My attempt:

print('{}:{}:{}'.format("%02d" % hours, "%02d" % minutes, ("%.3f" % seconds).zfill(2)))

I end up getting HH:MM:S.mmm sometimes. I need there to be two seconds digits even if there is a leading zero.

Upvotes: 1

Views: 2276

Answers (1)

nanojohn
nanojohn

Reputation: 582

You should be able to do the following with .format():

print('{:0>2d}:{:0>2d}:{:06.3f}'.format(hours,minutes,seconds))

In particular, 0>2d forces the integers hours and minutes to be of length 2. Further, 06.3f implies that the entire float representation should be 6 characters long (including the '.') and have 3 decimal places to the right of the period.

Upvotes: 3

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