Replacing instances of a character in a string

Question

This simple code that simply tries to replace semicolons (at i-specified postions) by colons does not work:

for i in range(0,len(line)):
     if (line[i]==\"         


        

Answer 1

You can do this:

string = "this; is a; sample; ; python code;!;" #your desire string
result = ""
for i in range(len(string)):
    s = string[i]
    if (s == ";" and i in [4, 18, 20]): #insert your desire list
        s = ":"
    result = result + s
print(result)