Canonicalize CIDR: Difference between revisions
Solution using Python standard library
(Clean up task description a bit.) |
(Solution using Python standard library) |
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print(f"{ip:<18} -> {rv}")
assert rv == expect
</lang>
{{out}}
<pre>
36.18.154.103/12 -> 36.16.0.0/12
62.62.197.11/29 -> 62.62.197.8/29
67.137.119.181/4 -> 64.0.0.0/4
161.214.74.21/24 -> 161.214.74.0/24
184.232.176.184/18 -> 184.232.128.0/18
</pre>
===Using standard library===
The <code>ipaddress</code> module was added in Python version 3.3.
<lang python>import ipaddress
def canonicalize(address: str) -> str:
return str(ipaddress.ip_network(address, strict=False))
TEST_CASES = [
("36.18.154.103/12", "36.16.0.0/12"),
("62.62.197.11/29", "62.62.197.8/29"),
("67.137.119.181/4", "64.0.0.0/4"),
("161.214.74.21/24", "161.214.74.0/24"),
("184.232.176.184/18", "184.232.128.0/18"),
]
if __name__ == "__main__":
for ip, expect in TEST_CASES:
rv = canonicalize(ip)
print(f"{ip:<18} -> {rv}")
assert rv == expect, expect
</lang>
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