New contribution to Python built-in libraries.

Greetings, I'm Kiruthik from India. I've been studying coding for the past
two years. I know that strings are immutable in Python. But, most of the
people can't change the elements in the string as default. So, I came up
with a solution by creating a function called *strangelt. *This function
has three parameters in it and works faster. It has the ability to get a
string from the user and make changes to the element of the string using
index values. I found that it would be a pretty good solution for people's
problems. I hereby kindly request you to include this function in Python
built-in libraries from the release of the next version.

Expansion of strangelt: *str*ing+ch*ang*e+*el*ement
*Syntax:*
*string_variable=strangelt(string,index,new value to be replaced)*

Thank You,
Kiruthik.

def strangelt(s,j,m):
    l=[]
    for i in s:
        if(i==s[j]):
            i=m
        l.append(i)
    return(''.join(l))

def strangelt(s,j,m):
    l=[]
    for i in s:
        if(i==s[j]):
            i=m
        l.append(i)
    return(''.join(l))