How to convert a CIDR prefix to a dotted-quad netmask in Python? -

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How can I convert a CIDR prefix into a dotted-quad netmask into a dragon?

For example, if the prefix 12 needs me to return 255.240.0.0 .

You can do it like this: 

  def cidr (Prefix): Return socket.inet_ntoa (struct.pack ("& gt; I", (0xffffffff & lt; (32 - prefix)) & amp; 0xffffffff)

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