Python parameters and functions
<p>I just started learning Python and I've just been messing around typing different codes for practice to learn, and I made this code:</p>

<pre><code>import math
def lol():
    print (math.cos(math.pi))
    print ("I hope this works")

def print_twice(bruce):
    print bruce
    print bruce



print_twice(lol())    
</code></pre>

<p>When I run it, my output is:</p>

<pre><code>-1.0
I hope this works
None
None
</code></pre>

<p>How come it isn't printing the function lol() twice?</p>
