交换字符串中的字母

def swap_characters(s, i, j):
    s_list = list(s)
    s_list[i], s_list[j] = s_list[j], s_list[i]
    return ''.join(s_list)

s = "abcdefg"
i = 2
j = 4
result = swap_characters(s, i, j)
print(result)

def swap_characters(s, i, j):
    s = s[:i] + s[j] + s[i+1:j] + s[i] + s[j+1:]
    return s

s = "abcdefg"
i = 2
j = 4
result = swap_characters(s, i, j)
print(result)