Efficient way to add spaces between characters in a string

Question

Say I have a string s    BINGO   I want to iterate over the string to produce  B I N G O    This is what I did   result      for ch in s     result   result   ch       print result  -1        to rid of space after O   Is there a more efficient way to go about this

User · Answer

s    BINGO  print s replace          1  -1     Timings below    python -m timeit -s s    BINGO    s replace         1 -1   1000000 loops  best of 3  0 584 usec per loop   python -m timeit -s s    BINGO        join s   100000 loops  best of 3  1 54 usec per loop

User · Answer

s    BINGO  print     join s     Should do it

User · Answer

A very pythonic and practical way to do it is by using the string join   method  str join iterable   The official Python documentations says   Return a string which is the concatenation of the strings in iterable    The separator between elements is the string providing this method   How to use it  Remember  this is a string method  This method will be applied to the str above  which reflects the string that will be used as separator of the items in the iterable  Let s have some practical example  iterable    quot BINGO quot  separator    quot   quot    A whitespace character                    The string to which the method will be applied separator join iterable   gt   B I N G O   In practice you would do it like this  iterable    quot BINGO quot       quot   quot  join iterable   gt   B I N G O   But remember that the argument is an iterable  like a string  list  tuple  Although the method returns a string  iterable     B    I    N    G    O        quot   quot  join iterable   gt   B I N G O   What happens if you use a hyphen as a string instead  iterable     B    I    N    G    O        quot - quot  join iterable   gt   B-I-N-G-O

User · Answer

The most efficient way is to take input make the logic and run so the code is like this to make your own space maker need   input  quot Write a string -  quot   result      for character in need     result   result   character       print result       to rid of space after O  but if you want to use what python give then use this code need2   input  quot Write a string -  quot    print  quot   quot  join need2

[python] Efficient way to add spaces between characters in a string

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