How to split a string into an array of characters in Python

Question

I ve tried to look around the web for answers to splitting a string into an array of characters but I can t seem to find a simple method  str split     does not seem to work like Ruby does  Is there a simple way of doing this without looping

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I you just need an array of chars   arr   list str    If you want to split the str by a particular str     str    temp  temps  will will be   temp    temps   arr   str split

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gt  gt  gt  s    foobar   gt  gt  gt  list s    f    o    o    b    a    r     You need list

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I explored another two ways to accomplish this task  It may be helpful for someone   The first one is easy   In  25   a      In  26   s    foobar  In  27   a    s In  28   a Out 28     f    o    o    b    a    r     And the second one use map and lambda function  It may be appropriate for more complex tasks   In  36   s    foobar12  In  37   a   map lambda c  c  s  In  38   a Out 38     f    o    o    b    a    r    1    2     For example    isdigit  isspace or another facilities such as regexp may be used In  40   a   map lambda c  c if c isalpha   else     s  In  41   a Out 41     f    o    o    b    a    r             See python docs for more methods

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If you want to process your String one character at a time  you have various options     uhello   u Hello u0020World       Using List comprehension      print  x for x in uhello     Output     H    e    l    l    o         W    o    r    l    d        Using map      print list map lambda c2  c2  uhello      Output     H    e    l    l    o         W    o    r    l    d        Calling Built in list function      print list uhello     Output       H    e    l    l    o         W    o    r    l    d        Using for loop      for c in uhello      print c    Output     H e l l o  W o r l d

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To split a string s  the easiest way is to pass it to list    So  s    abc  s l   list s     s l is now   a    b    c    You can also use a list comprehension  which works but is not as concise as the above  s l    c for c in s   There are other ways  as well  but these should suffice  Later  if you want to recombine them  a simple call to  quot  quot  join s l  will return your list to all its former glory as a string

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split   inbuilt function will only separate the value on the basis of certain condition but in the single word  it cannot fulfill the condition  So  it can be solved with the help of list    It internally calls the Array and it will store the value on the basis of an array   Suppose   a    bottle  a split      will only return the word but not split the every single char   a    bottle  list a     will separate   b   o   t   t   l   e

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You take the string and pass it to list    s    mystring  l   list s  print l

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You can also do it in this very simple way without list      gt  gt  gt   c for c in  foobar     f    o    o    b    a    r

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You can use extend method in list operations as well   gt  gt  gt  list1       gt  gt  gt  list1 extend  somestring    gt  gt  gt  list1   s    o    m    e    s    t    r    i    n    g

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Unpack them   word    Paralelepipedo  print   word

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Well  much as I like the list s  version  here s another more verbose way I found  but it s cool so I thought I d add it to the fray     gt  gt  gt  text    My hovercraft is full of eels   gt  gt  gt   text i  for i in range len text      M    y         h    o    v    e    r    c    r    a    f    t         i    s         f    u    l    l         o    f         e    e    l    s

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If you wish to read only access to the string you can use array notation directly   Python 2 7 6  default  Mar 22 2014  22 59 38    GCC 4 8 2  on linux2 Type  help    copyright    credits  or  license  for more information   gt  gt  gt  t    my string   gt  gt  gt  t 1   y    Could be useful for testing without using regexp  Does the string contain an ending newline    gt  gt  gt  t -1       n  False  gt  gt  gt  t    my string n   gt  gt  gt  t -1       n  True

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from itertools import chain  string    your string  chain string    similar to list string  but returns a generator that is lazily evaluated at point of use  so memory efficient

User · Answer

The task boils down to iterating over characters of the string and collecting them into a list  The most na  ve solution would look like  result      for character in string      result append character    Of course  it can be shortened to just  result    character for character in string    but there still are shorter solutions that do the same thing   list constructor can be used to convert any iterable  iterators  lists  tuples  string etc   to list     gt  gt  gt  list  abc     a    b    c     The big plus is that it works the same in both Python 2 and Python 3   Also  starting from Python 3 5  thanks to the awesome PEP 448  it s now possible to build a list from any iterable by unpacking it to an empty list literal    gt  gt  gt     abc     a    b    c     This is neater  and in some cases more efficient than calling list constructor directly   I d advise against using map-based approaches  because map does not return a list in Python 3  See How to use filter  map  and reduce in Python 3

[python] How to split a string into an array of characters in Python?

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