Python's equivalent to C# Hash (#) in a format string

Question

In C# and other languages, a hash (#) in the format string will be replaced by a number if one exists, and nothing if it doesn't. So a string such as:

number1 = 12.3456
number2 = 12.3
String.Format("0.00####", number1)
String.Format("0.00####", number2)

Will output number1 = 12.3456 but number2 = 12.30. A zero in the format string means if there isn't enough decimal numbers, a zero will be printed out instead.

My question is, is there a similar functionality in Python? I know I can use "{:.6F}" to format a number to 6 decimal points.

As you already mentioned in your question you can use a format specifier in curly brackets. In addition to this there is a complete Mini-Language for string formatting which can be used with the string.format() function. — albert
– albert, Commented Feb 16, 2016 at 21:19

MaxU - stand with Ukraine · Accepted Answer · 2016-02-16 21:55:00Z

3

try this:

print("{:0<.6f} {:0<.1f}".format(12.355, 0.12345))

Output:

12.355000 0.1

edited Feb 16, 2016 at 21:55

answered Feb 16, 2016 at 21:21

MaxU - stand with Ukraine

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3 Comments

Moataz Elmasry Over a year ago

When i change it to "{:0<1f}".format(12.355), I still get 12.355000. Update: I think you missed a dot in the middle, should be "{:0<.1f}".format(12.355)

MaxU - stand with Ukraine Over a year ago

@MoatazElmasry, sure, thanks for the correction! i've updated the answer.

Moataz Elmasry Over a year ago

no worries, I've marked your answer as correct. Thanks a lot!

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