[Tutor] IPcount = 0 when used with subprocess.call (use something to convert to integer?)

[Rogelio]

I am wrapping a Python wrapper script to "wc -l" (count lines) of a
list of IP addresses

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import subprocess
IPcount = subprocess.call(['wc -l file.txt | awk \'{print $1}\''], shell=True)
print "You have",IPcount,"IP addresses that are alive."

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I get the following output

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46
You have 0 IP addresses that are alive.
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Why does IPcount not equal 46?  Is this what the stout is for?