Setting fixed length with python

Question

I have str that are like '60' or '100'. I need the str to be '00060' and '00100',

How can i do this? code is something like this: I was using '0'+'0'+'0' as plug. now need to fix d==0006000100

  a4 ='60'
  a5 ='100'

  d=('0'+'0'+'0'+a4+'0'+'0'+a5)

score 25 · Accepted Answer · answered Feb 28 '11 at 04:13

25

Since you are manipulating strings, str.zfill() does exactly what you want.

>>> s1, s2 = '60', '100'
>>> print s1.zfill(5), s2.zfill(5)
00060 00100

answered Feb 28 '11 at 04:13

Wang Dingwei

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Cameron · Answer 2 · 2011-02-28T04:14:29.957

10

Like this:

num = 60 
formatted_num = u'%05d' % num

See the docs for more information about formatting numbers as strings.

If your number is already a string (as your updated question indicates), you can pad it with zeros to the right width using the rjust string method:

num = u'60'
formatted_num = num.rjust(5, u'0')

edited Feb 28 '11 at 04:14

answered Feb 28 '11 at 04:06

Cameron

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it comes as '60' i am combining example 0006000100, – Merlin Feb 28 '11 at 04:08
@user: OK, it seems like Wang's answer (using `zfill`) is the way to go in your case since it's built for exactly the type of thing you're doing – Cameron Feb 28 '11 at 04:21
1

From http://docs.python.org/release/3.0.1/whatsnew/3.0.html: "the % operator is still supported; it will be deprecated in Python 3.1 and removed from the language at some later time.". Use `"".format()` instead for future compatibility: `u"{0:0>5d}".format(60)` or `u"{0:0>5s}".format(str(60))`. – Lauritz V. Thaulow Feb 28 '11 at 11:04
I just discovered you can use !s in the format string to force string conversion, so you need only a single case to handle both 60 and '60': `"{0!s:0>5s}".format(60)` – Lauritz V. Thaulow Mar 01 '11 at 15:14

jsbueno · Answer 3 · 2017-02-10T15:36:50.047

2

If "60" is already a string, you have to convert it to a number before applying the formatting. The most practical one works just like C's printf:

a  ="60"
b = "%05d" % int(a)

edited Feb 10 '17 at 15:36

answered Feb 28 '11 at 04:10

jsbueno

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score 0 · Answer 4 · answered Feb 28 '11 at 04:08

Reading your favorite Python documentation appreciated:

http://docs.python.org/library/string.html#formatstrings

"""

If the width field is preceded by a zero ('0') character, this enables zero-padding. This is equivalent to an alignment type of '=' and a fill character of '0'. """

score 0 · Answer 5 · answered Feb 28 '11 at 09:27

0

If it's already a string you might want to use the .zfill() method.

myval.fill(5)

answered Feb 28 '11 at 09:27

Jim Dennis

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Setting fixed length with python

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