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    <p>Use the <a href="http://alastairs-place.net/netifaces/" rel="noreferrer"><code>netifaces</code></a> module. Because networking is complex, using netifaces can be a little tricky, but here's how to do what you want:</p> <pre><code>&gt;&gt;&gt; import netifaces &gt;&gt;&gt; netifaces.interfaces() ['lo', 'eth0'] &gt;&gt;&gt; netifaces.ifaddresses('eth0') {17: [{'broadcast': 'ff:ff:ff:ff:ff:ff', 'addr': '00:11:2f:32:63:45'}], 2: [{'broadcast': '10.0.0.255', 'netmask': '255.255.255.0', 'addr': '10.0.0.2'}], 10: [{'netmask': 'ffff:ffff:ffff:ffff::', 'addr': 'fe80::211:2fff:fe32:6345%eth0'}]} &gt;&gt;&gt; for interface in netifaces.interfaces(): ... print netifaces.ifaddresses(interface)[netifaces.AF_INET] ... [{'peer': '127.0.0.1', 'netmask': '255.0.0.0', 'addr': '127.0.0.1'}] [{'broadcast': '10.0.0.255', 'netmask': '255.255.255.0', 'addr': '10.0.0.2'}] &gt;&gt;&gt; for interface in netifaces.interfaces(): ... for link in netifaces.ifaddresses(interface)[netifaces.AF_INET]: ... print link['addr'] ... 127.0.0.1 10.0.0.2 </code></pre> <p>This can be made a little more readable like this:</p> <pre><code>from netifaces import interfaces, ifaddresses, AF_INET def ip4_addresses(): ip_list = [] for interface in interfaces(): for link in ifaddresses(interface)[AF_INET]: ip_list.append(link['addr']) return ip_list </code></pre> <p>If you want IPv6 addresses, use <code>AF_INET6</code> instead of <code>AF_INET</code>. If you're wondering why <code>netifaces</code> uses lists and dictionaries all over the place, it's because a single computer can have multiple NICs, and each NIC can have multiple addresses, and each address has its own set of options.</p>
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    1. POHow do I determine all of my IP addresses when I have multiple NICs?
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    1. USHarley Holcombe
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    1. POHow do I determine all of my IP addresses when I have multiple NICs?
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    1. COPS. This answer is fully tested, unlike the other highly upvoted one I gave. That (very wrong) answer has been deleted.
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      1. USHarley Holcombe
    2. COJust a short note: on my local machine, the netifaces.ifaddresses may return an empty dict in some cases, so the code will fail in that case when trying to access the AF_INET key. Minor fix, but otherwise great answer.
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      1. USzvikico
 

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