For loop stops after 1st case

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I have a for loop that goes through each word in a string and returns a modified string.

However, the loop stops after the first word.

The summarized code looks like this:

def format(x):
    return x
def modify(string):
    for x in words:
        if statement:
            return x[v:] + x[:v] + "xx"
    else:
        return x + "xx"
def final(string):
    return format(modify(string))

The format function format what modify does, while the final function puts everything together. It works perfect for the first word in the string, but stops after that.

Current input and output:

>>>final("This is a test case")
>>>>Htisxx

What I want:

>>>final("This is a test case")
>>>>Htisxx isxx axx esttxx asecxx

Why does the loop stop? How can I fix this?

asked 31 secs ago

user3377386

1