How can I swap 1 letter and give all possible letter in python

Question

How can I swap only "one" letter and give all possible output in python3 and append into the list

for example: the word "study" we will have all possible output like

swap the s:
tsudy, tusdy, tudsy, tudys, 
#swap the t:
tsudy, sutdy, sudty, sudyt
#also with u,d,y:
...

Answer 1

You can convert word into list of chars,

chars = list(word)

remove selected char from list using its position

chars.pop(index)

and later add this char in different places in this list

new_chars = chars[:pos] + [char] + chars[pos:]

---

Code:

word = 'study'

for index, char in enumerate(word):
    print('char:', char)
    # create list without selected char
    chars = list(word)
    chars.pop(index)

    # put selected char in different places
    for pos in range(len(chars)+1):
        # create new list 
        new_chars = chars[:pos] + [char] + chars[pos:]
        new_word = ''.join(new_chars)

        # skip original word
        if new_word != word:
            print(pos, '>', new_word)

Result:

char: s
1 > tsudy
2 > tusdy
3 > tudsy
4 > tudys
char: t
0 > tsudy
2 > sutdy
3 > sudty
4 > sudyt
char: u
0 > ustdy
1 > sutdy
3 > stduy
4 > stdyu
char: d
0 > dstuy
1 > sdtuy
2 > stduy
4 > stuyd
char: y
0 > ystud
1 > sytud
2 > styud
3 > stuyd

---

BTW: I wouldn't call it "swapping" but "moving" char. In "swapping" I would rather replace two chars - ie. swapping a with c in abcd gives cbad, not bcad (like in "moving")