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42 lines
1.7 KiB
Markdown
42 lines
1.7 KiB
Markdown
---
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title: "How to get list of IP Addresses in Python"
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date: 2020-09-07T20:03:24-04:00
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draft: false
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tags: ["python", "networking"]
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---
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[Elemag](https://stackoverflow.com/users/2436840/elemag) on gave a quick solution on StackOverflow on [how to determine IP addresses with multiple NICS](https://stackoverflow.com/questions/270745/how-do-i-determine-all-of-my-ip-addresses-when-i-have-multiple-nics).
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His one-line solution:
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```python
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import netifaces
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ip_addresses = [netifaces.ifaddresses(iface)[netifaces.AF_INET][0]['addr'] for iface in netifaces.interfaces() if netifaces.AF_INET in netifaces.ifaddresses(iface)]
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```
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Expanded out to see what is happening
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```python
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import netifaces
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interface_list = netifaces.interfaces()
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# Get addresses, netmask, etc. information
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address_entries = (netifaces.ifaddresses(iface) for iface in interface_list)
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# Only pay attention to ipv4 address types
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ipv4_address_entries = (address[netifaces.AF_INET] for address in address_entries if netifaces.AF_INET in address)
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# Since multiple addresses can be associated, only look at the first ip address
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ipv4_addresses = [address[0]['addr'] for address in ipv4_address_entries]
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```
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We can easily adjust this to ask for IPv6 addresses by using `netifaces.AF_INET6` instead.
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```python
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import netifaces
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interface_list = netifaces.interfaces()
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# Get addresses, netmask, etc. information
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address_entries = (netifaces.ifaddresses(iface) for iface in interface_list)
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# Only pay attention to ipv6 address types
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ipv6_address_entries = (address[netifaces.AF_INET6] for address in address_entries if netifaces.AF_INET6 in address)
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# Since multiple addresses can be associated, only look at the first ip address
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ipv6_addresses = [address[0]['addr'] for address in ipv6_address_entries]
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```
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