How to check if an argument from commandline has been set?
<p>I can call my script like this:</p>

<pre><code>python D:\myscript.py 60
</code></pre>

<p>And in the script I can do:</p>

<pre><code>arg = sys.argv[1]
foo(arg)
</code></pre>

<p>But how could I test if the argument has been entered in the command line call? I need to do something like this:</p>

<pre><code>if isset(sys.argv[1]):
    foo(sys.argv[1])
else:
    print "You must set argument!!!"
</code></pre>
