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    <p>I think your problem is simple, and has nothing to do with how you're passing values between functions.</p> <p>In <code>main</code>, you're reading a value from the user like this:</p> <pre><code>x=input("Enter the choice") </code></pre> <p>The <a href="http://docs.python.org/3/library/functions.html#input" rel="nofollow"><code>input</code></a> function:</p> <blockquote> <p>… reads a line from input, converts it to a string (stripping a trailing newline), and returns that.</p> </blockquote> <p>So, if the user types <code>1</code> at the prompt, you get back the string <code>"1"</code>.</p> <p>Now, you pass that value—perfectly correctly—to <code>menu</code>.</p> <p>In <code>menu</code>, you then try to compare it to various numbers, like this:</p> <pre><code>if x == 1: </code></pre> <p>But this will never be true. A string, like <code>"1"</code>, is <em>never</em> equal to a number, like <code>1</code>. They're not even the same <em>kind</em> of value, much less the same value.</p> <p>So, you need to do one of two things:</p> <ul> <li>Convert the input to an number. For example, change <code>menu(x,l)</code> to <code>menu(int(x), l)</code>. OR…</li> <li>Write <code>menu</code> to expect strings. For example, change <code>if x == 1:</code> to <code>if x == "1":</code>.</li> </ul> <hr> <p>You may be wondering why that <code>print (x)</code> didn't help you debug the problem.</p> <p><code>print(x)</code> prints out the end-user-friendly string representation of whatever you give it. That is, it automatically calls the <a href="http://docs.python.org/3/library/functions.html#func-str" rel="nofollow"><code>str</code></a> function for you. For debugging purposes, you often want to use <a href="http://docs.python.org/3/library/functions.html#repr" rel="nofollow"><code>repr</code></a> instead of <code>str</code>, to get the programmer-friendly string representation instead of the end-user-friendly string representation.</p> <p>For example, <code>print(str("10"))</code> will print out <code>10</code>—just like <code>print(str(10))</code>, so you can't tell them apart. But <code>print(repr("10"))</code> will print out <code>'10'</code>, unlike <code>print(repr(10))</code>, while prints <code>10</code>, so you <em>can</em> tell them apart. <code>repr</code> can also help you spot things like strings with invisible characters in them, having special "node" objects from a parser instead of just strings, etc.</p>
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    1. POget the list and input from one function and run them in different function
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    1. USabarnert
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    1. POget the list and input from one function and run them in different function
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    1. CO+1 for the print explanation, very useful
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