Finding position of characters in a string

Question

I have created some code to determine the position of characters in a string. However, the count starts from 0 not 1.

string="pandas"
for i,c in enumerate(string):
    if "a"==c: print i

I would also be interested in a more naive solution to my problem which didn't use enumerate.

Answer 1

Start enumerate at 1 as follows:

for i, c in enumerate(string, 1):
    if "a"==c: print i

It seems you are using Python 2, so in case you want to use Python 3, use:

for i, c in enumerate(string, 1):
    if "a"==c: print(i)

A more naive solution:

for i in range(len(string)):
    if "a" == string[i]:
        print(i + 1)

Answer 2

you could also use regex:

import re

[m.start() for m in re.finditer('a', string)]

or

[m.start()+1 for m in re.finditer('a', string)]

depending on what you want

Answer 3

string="pandas"
for i,c in enumerate(string,1):
    if "a"==c: print(i)

or a more python solution using list comprehension and regex :

[x.end() for x in re.finditer('a', string)]