CODEWITHSUNDEEP
pythonformattingformat
Blackscholes
Blackscholes

Reputation: 45

Always print random values between ] -100 ; 100 [ as 2 digits before and 2 digits after the dot, python 3

I have float numbers between ] -100 ; 100 [ (100 not included) coming as inputs in my code (containing 400+ lines, which is why I simplify my question as most as I can).

Then I print one of these numbers in the middle of a string, using .format().

I have found how to make this separately, but only with integer for leading zeros e.g. :

number1 = 1 number2 =1.1 print('{:02d}'.format(number1)) print('{:.2f}'.format(number2))

which would return me:

01 1.10

Now what I would like is to print a number such as number2 as 01.10. Is there a way to do so simply ?

I hope I have been clear and thank you in advance for your answers !

Upvotes: 2

Views: 53

Answers (2)

Olivier Melançon
Olivier Melançon

Reputation: 22324

For Python3.6+, you can use literal string interpolation. You can then use the standard format specification to provide precision and left filling.

num = -1.123
print(f'Formatted number: {num: 06.2f}')
# prints: 'Formatted number: -01.12'

num = 6.789
print(f'Formatted number: {num: 06.2f}')
# prints: 'Formatted number: 06.79'

Inside the bracket:

  • 'num' is the variable to be formatted in.

  • ' 06' indicates that output should have width 6, left filled with 0, but that positive number are left-padded with a space instead of an extra 0

  • '.2f' indicates that you want a float with 2 digit of precision.

Upvotes: 1

user2314737
user2314737

Reputation: 29407

To pad a number with zeros use

print('{: 06.2f}'.format(-99.3))

Explanation: the padding value 6 is the length of the whole number, including . and sign, a space after : indicates that an extra space should be used for positive numbers (see the docs)

Upvotes: 2

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