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

to use the .replace() method effectively on string without creating a separate list for example take a look at the list username containing string with some white space, we want to replace the white space with an underscore in each of the username string.

usernames = ["Joey Tribbiani", "Monica Geller", "Chandler Bing", "Phoebe Buffay"]

to replace the white spaces in each username consider using the range function in python.

for i in range(len(usernames)):
    usernames[i] = usernames[i].lower().replace(" ", "_")

print(usernames)