Lowercase all strings in a list by list comprehension : <p>I am confused on how my code is not turning all strings into lowercase?    </p>

<pre><code>def set_lowercase(strings):
    """ lower the case 2. """
    return [i.lower() for i in strings]


strings = ['Right', 'SAID', 'Fred']
set_lowercase(strings)
print(strings)
</code></pre>
