How can I capitalize the first letter of each word in a string

Question

s    the brown fox      do something here    s should be   The Brown Fox   What s the easiest way to do this

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If only you want the first letter    gt  gt  gt   hello world  capitalize    Hello world    But to capitalize each word    gt  gt  gt   hello world  title    Hello World

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Although all the answers are already satisfactory  I ll try to cover the two extra cases along with the all the previous case   if the spaces are not uniform and you want to maintain the same  string   hello    world i  am    here    if all the string are not starting from alphabets  string   1 w 2 r 3g  Here you can use this  def solve s       a   s split          for i in range len a            a i   a i  capitalize       return     join a   This will give you  output   Hello    World I  Am    Here output   1 W 2 R 3g

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An empty string will raise an error if you access  1    Therefore I would use  def my uppercase title       if not title         return        return title 0  upper     title 1    to uppercase the first letter only

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Just because this sort of thing is fun for me  here are two more solutions   Split into words  initial-cap each word from the split groups  and rejoin   This will change the white space separating the words into a single white space  no matter what it was   s    the brown fox  lst    word 0  upper     word 1   for word in s split    s       join lst      EDIT  I don t remember what I was thinking back when I wrote the above code  but there is no need to build an explicit list  we can use a generator expression to do it in lazy fashion   So here is a better solution   s    the brown fox  s       join word 0  upper     word 1   for word in s split        Use a regular expression to match the beginning of the string  or white space separating words  plus a single non-whitespace character  use parentheses to mark  match groups    Write a function that takes a match object  and returns the white space match group unchanged and the non-whitespace character match group in upper case   Then use re sub   to replace the patterns   This one does not have the punctuation problems of the first solution  nor does it redo the white space like my first solution   This one produces the best result   import re s    the brown fox   def repl func m          process regular expression match groups for word upper-casing problem        return m group 1    m group 2  upper    s   re sub      s   S    repl func  s     gt  gt  gt  re sub      s   S    repl func  s   They re Bill s Friends From The UK    I m glad I researched this answer   I had no idea that re sub   could take a function   You can do nontrivial processing inside re sub   to produce the final result

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The  title   method of a string  either ASCII or Unicode is fine  does this   gt  gt  gt   quot hello world quot  title    Hello World   gt  gt  gt  u quot hello world quot  title   u Hello World   However  look out for strings with embedded apostrophes  as noted in the docs   The algorithm uses a simple language-independent definition of a word as groups of consecutive letters  The definition works in many contexts but it means that apostrophes in contractions and possessives form word boundaries  which may not be the desired result   gt  gt  gt   quot they re bill s friends from the UK quot  title    quot They Re Bill S Friends From The Uk quot

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Don t overlook the preservation of white space  If you want to process  fred   flinstone  and you get  Fred Flinstone  instead of  Fred   Flinstone   you ve corrupted your white space  Some of the above solutions will lose white space   Here s a solution that s good for Python 2 and 3 and preserves white space   def propercase s       return    join map    capitalize  re split r   s     s

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Copy-paste-ready version of  jibberia anwser   def capitalize line       return     join s  1  upper     s 1   for s in line split

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As Mark pointed out  you should use  title     quot MyAwesomeString quot  title    However  if would like to make the first letter uppercase inside a Django template  you could use this      quot MyAwesomeString quot  title     Or using a variable     myvar title

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The  title   method can t work well   gt  gt  gt   quot they re bill s friends from the UK quot  title    quot They Re Bill S Friends From The Uk quot   Try string capwords   method  import string string capwords  quot they re bill s friends from the UK quot    gt  gt  gt  quot They re Bill s Friends From The Uk quot   From the Python documentation on capwords   Split the argument into words using str split    capitalize each word using str capitalize    and join the capitalized words using str join    If the optional second argument sep is absent or None  runs of whitespace characters are replaced by a single space and leading and trailing whitespace are removed  otherwise sep is used to split and join the words

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Capitalize string with non-uniform spaces I would like to add to  Amit Gupta s point of non-uniform spaces  From the original question  we would like to capitalize every word in the string s    the brown fox   What if the string was s    the brown      fox  with non-uniform spaces  def solve s         If you want to maintain the spaces in the string  s    the brown      fox        Use s split      instead of s split          s split   returns   the    brown    fox         while s split      returns   the    brown                        fox       capitalized word list    word capitalize   for word in s split           return     join capitalized word list

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Here s a summary of different ways to do it  they will work for all these inputs                  gt             a b c         gt   A B C                foO baR       gt   FoO BaR         foo    bar    gt   Foo    Bar      foo s bar     gt   Foo s Bar       foo s1bar     gt   Foo s1bar       foo 1bar      gt   Foo 1bar         - The simplest solution is to split the sentence into words and capitalize the first letter then join it back together      Be careful with multiple spaces  and empty strings   for empty words w 0  would cause an index error     but with w  1  we get an empty string as desired def cap sentence s     return     join w  1  upper     w 1   for w in s split          - If you don t want to split the input string into words first  and using fancy generators     Iterate through each of the characters in the string and capitalize    the first char and any char after a blank space from itertools import chain  def cap sentence s     return    join   c upper   if prev        else c  for c  prev in zip s  chain      s       - Or without importing itertools   def cap sentence s     return    join   c upper   if i    0 or s i-1         else c  for i  c in enumerate s      - Or you can use regular expressions  from steveha s answer      match the beginning of the string or a space  followed by a non-space import re def cap sentence s     return re sub      s   S    lambda m  m group 1    m group 2  upper    s      Now  these are some other answers that were posted  and inputs for which they don t work as expected if we are using the definition of a word being the start of the sentence or anything after a blank space     return s title      Undesired outputs    foO baR       gt   Foo Bar          foo s bar     gt   Foo S Bar    foo s1bar     gt   Foo S1Bar        foo 1bar      gt   Foo 1Bar              return     join w capitalize   for w in s split            or   import string   return string capwords s     Undesired outputs   foO baR       gt   Foo Bar         foo    bar    gt   Foo Bar          using     for the split will fix the second output  but capwords   still won t work for the first    return     join w capitalize   for w in s split               or   import string   return string capwords s          Undesired outputs   foO baR       gt   Foo Bar            Be careful with multiple blank spaces    return     join w 0  upper     w 1   for w in s split      Undesired outputs   foo    bar    gt   Foo Bar

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The  title   method won t work in all test cases  so using  capitalize     replace   and  split   together is the best choice to capitalize the first letter of each word  eg  def caps y        k y split        for i in k          y y replace i i capitalize         return y

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To capitalize words    str    quot this is string example      wow    quot   print  quot str title      quot   str title      Gary02127 comment  the below solution works with title with apostrophe import re  def titlecase s       return re sub r quot  A-Za-z     A-Za-z     quot   lambda mo  mo group 0  0  upper     mo group 0  1   lower    s   text    quot He s an engineer  isn t he  SnippetBucket com  quot  print titlecase text

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If str title   doesn t work for you  do the capitalization yourself    Split the string into a list of words Capitalize the first letter of each word Join the words into a single string   One-liner    gt  gt  gt      join  s 0  upper     s 1   for s in  they re bill s friends from the UK  split         They re Bill s Friends From The UK    Clear example   input    they re bill s friends from the UK  words   input split      capitalized words      for word in words      title case word   word 0  upper     word 1       capitalized words append title case word  output       join capitalized words

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In case you want to downsize   Assuming you are opening a new file with open input file  as file      lines    x for x in reader file  if x     for loop to parse the file by line for line in lines      name    x strip   lower   for x in line if x      print name    Check the result

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A quick function worked for Python 3  Python 3 6 9  default  Nov  7 2019  10 44 02    GCC 8 3 0  on linux Type  help    copyright    credits  or  license  for more information   gt  gt  gt  capitalizeFirtChar   lambda s  s  1  upper     s 1    gt  gt  gt  print capitalizeFirtChar                                                                                                                                gt  gt  gt  print capitalizeFirtChar                                                                                                              gt  gt  gt  print capitalizeFirtChar  faith and Labour make Dreams come true     Faith and Labour make Dreams come true

User · Answer

Why do you complicate your life with joins and for loops when the solution is simple and safe    Just do this   string    the brown fox  string 0  upper   string 1

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I really like this answer   Copy-paste-ready version of  jibberia anwser   def capitalize line       return     join  s 0  upper     s 1   for s in line split          But some of the lines that I was sending split off some blank    characters that caused errors when trying to do s 1     There is probably a better way to do this  but I had to add in a if len s  0  as in  return     join  s 0  upper     s 1   for s in line split      if len s  gt 0

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The suggested method str title   does not work in all cases  For example   string    a b 3c  string title    gt   A B 3C    instead of  A B 3c     I think  it is better to do something like this   def capitalize words string       words   string split        just change the split      method     return     join  word capitalize   for word in words    capitalize words string   gt  A B 3c

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Easiest solution for your question  it worked in my case  import string def solve s       return string capwords s            s input   res solve s  print res

[python] How can I capitalize the first letter of each word in a string?

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