Python 3.3+ipaddressfunction

ipaddress.v4_int_to_packed()

packing to bytes

Converts an integer into the 4 bytes of an IPv4 address in network (big-endian) order.

Syntax

ipaddress.v4_int_to_packed(address)

It is the same as n.to_bytes(4, 'big') or IPv4Address(n).packed, so you rarely need it. A negative number or one of 2**32 and above raises ValueError rather than wrapping around. For the reverse, use IPv4Address(b) or ip_address(b): 4-byte input is read as a packed address.

Examples

import ipaddress
b = ipaddress.v4_int_to_packed(3232235521)
print(b, b == (3232235521).to_bytes(4, 'big'))  # → b'\xc0\xa8\x00\x01' True
print(ipaddress.ip_address(b))  # → 192.168.0.1
ipaddress.v4_int_to_packed(2 ** 32)  # → ValueError: Address negative or too large for IPv4

See also

Common errors

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