How can I fill out a Python string with spaces

Question

I want to fill out a string with spaces  I know that the following works for zero s    gt  gt  gt  print     06d   4  000004    But what should I do when I want this     hi        of course I can measure string length and do str     leftover  but I d like the shortest way

User · Answer

you can also center your string     0   20   format  nice

User · Answer

As of Python 3 6 you can just do   gt  gt  gt  strng    hi   gt  gt  gt  f  strng   lt 10     with literal string interpolation   Or  if your padding size is in a variable  like this  thanks  Matt M       gt  gt  gt  to pad   10  gt  gt  gt  f  strng   lt  to pad

User · Answer

Use str ljust      gt  gt  gt   Hi  ljust 6   Hi        You should also consider string zfill    str ljust   and str center   for string formatting  These can be chained and have the  fill  character specified  thus    gt  gt  gt    3  zfill 8     blind  rjust 8     mice  ljust 8        center 40           00000003   blindmice                These string formatting operations have the advantage of working in Python v2 and v3   Take a look at pydoc str sometime  there s a wealth of good stuff in there

User · Answer

You could do it using list comprehension  this d give you an idea about the number of spaces too and would be a one liner    hello        join      for x in range 1 10    output -- gt   hello

User · Answer

Wouldn t it be more pythonic to use slicing   For example  to pad a string with spaces on the right until it s 10 characters long    gt  gt  gt  x    string       gt  gt  gt   x         10   10      string        To pad it with spaces on the left until it s 15 characters long    gt  gt  gt         15   x  -15             string    It requires knowing how long you want to pad to  of course  but it doesn t require measuring the length of the string you re starting with

User · Answer

You can try this   print    -100s      hi

User · Answer

Just remove the 0 and it will add space instead    gt  gt  gt  print     6d   4

User · Answer

Correct way of doing this would be to use Python s format syntax as described in the official documentation  For this case it would simply be     10   format  hi   which outputs   hi           Explanation     format spec        fill align  sign     0  width      precision  type  fill              lt any character gt  align              lt       gt               sign                    -        width            integer precision        integer type              b     c     d     e     E     f     F     g     G     n     o     s     x     X          Pretty much all you need to know is there     Update   as of python 3 6 it s even more convenient with literal string interpolation   foo    foobar  print f  foo 10  is great      foobar     is great

User · Answer

A nice trick to use in place of the various print formats    1  Pad with spaces to the right     hi                 8     2  Pad with leading zeros on the left     0000    str 2   -4

User · Answer

You can do this with str ljust width   fillchar        Return the string left justified in a string of length width  Padding is done using the specified fillchar  default is a space   The original string is returned if width is less than len s      gt  gt  gt   hi  ljust 10   hi

User · Answer

The new ish  string format method lets you do some fun stuff with nested keyword arguments  The simplest case   gt  gt  gt    message   lt 16   format message  Hi    Hi                If you want to pass in 16 as a variable   gt  gt  gt    message   lt  width    format message  Hi   width 16   Hi                 If you want to pass in variables for the whole kit and kaboodle    message  fill  align  width    format     message  Hi      fill         align   lt       width 16     Which results in  you guessed it    Hi                 And for all these  you can use python 3 6 f-strings  message    Hi  fill       align     lt   width   16 f  message  fill  align  width     And of course the result   Hi

User · Answer

For a flexible method that works even when formatting complicated string  you probably should use the string-formatting mini-language  using either the str format   method   gt  gt  gt    0   lt 16  StackOverflow   format  Hi      Python  gt  2 6  Hi               StackOverflow     of f-strings    gt  gt  gt  f   Hi    lt 16  StackOverflow      Python  gt   3 6  Hi               StackOverflow

User · Answer

Use Python 2 7 s mini formatting for strings     0   lt 8   format  123     This left aligns  and pads to 8 characters with the     character

[python] How can I fill out a Python string with spaces?

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