How to find the number value set to a specific character within a string (without counting) in python -

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• how find occurrences of element in list? 8 answers
• how find occurrences of element in list? 2 answers

i got project in need find of indices specific character appeared in string inputted user. example user inputs string "this test" , wanted find indices of t's in string 0, 11, 14 looked through built in commands , couldn't find real know method find this.

use enumerate , list comprehension:

st="this test"  print([i i, c in enumerate(st) if c.lower()=='t']) 

or:

print([i i, c in enumerate(st) if c in 'tt']) 

in either case, prints:

[0, 10, 13] 

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explanation

first thing 'makes work' strings iterable in python:

>>> st="this test" >>> c in st: ...    print c ...  t h s  s   t e s t 

second thing makes work enumerate adds count of characters in string tuple:

>>> tup in enumerate(st): ...    print tup ...  (0, 't') (1, 'h') (2, 'i') (3, 's') (4, ' ') (5, 'i') (6, 's') (7, ' ') (8, 'a') (9, ' ') (10, 't') (11, 'e') (12, 's') (13, 't') 

pulling 2 concepts list comprehension produces result:

[i i, c in enumerate(st) if c.lower()=='t']                  ^^^                               produces tuple of index , character        ^  ^                                        index, character                                   ^^^^^^^^^^^      test character if 't'  ^                                                 wanted - list of indices