Python format Integer into fixed length strings

Question

I want to generate a string based on an int along with zeros. And the length should always be of 5 not more then that nor less.

For example:

Consider a Integer: 1
Formatted String : 00001

Consider a Integer: 12
Formatted String : 00012

Consider a Integer: 110
Formatted String : 00110

Consider a Integer: 1111
Formatted String : 01111

Consider a Integer: 11111
Formatted String : 11111

score 90 · Accepted Answer · answered Oct 19 '14 at 02:44

90

Use the format() function or the str.format() method to format integers with zero-padding:

print format(integervalue, '05d')
print 'Formatted String : {0:05d}'.format(integervalue)

See the Format Specification Mini-Language; the leading 0 in the format signifies 0-padding, the 5 is the minimal field width; any number shorter than that is padded to the full width.

Demo:

>>> format(110, '05d')
'00110'
>>> 'Formatted String : {0:05d}'.format(12)
'Formatted String : 00012'

answered Oct 19 '14 at 02:44

Martijn Pieters

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I found this useful too: `print "position: {0:5d}, fix id: {1} padded wait in seconds: {2:03d}".format(12, 453585, 89)"` I mean, you can avoid padding with 0 (as in position) – Rodrigo Laguna May 31 '17 at 13:39
1

@RodrigoLaguna: sure, but the question specifically asked for padding with zeros. :-) – Martijn Pieters May 31 '17 at 15:29
4

You can also use f-strings (Python >=3.6): f'{integervalue:05d}' – MoTSCHIGGE Jan 20 '22 at 14:08

Python format Integer into fixed length strings

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