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ipaddress: Speed up IPv4Address.ipv6_mapped #119814

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ipaddress: Speed up IPv4Address.ipv6_mapped #119814

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2 changes: 1 addition & 1 deletion Lib/ipaddress.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1424,7 +1424,7 @@ def ipv6_mapped(self):
The IPv4-mapped IPv6 address per RFC 4291.

"""
return IPv6Address(f'::ffff:{self}')
return IPv6Address((0xFFFF << 32) + self._ip)


class IPv4Interface(IPv4Address):
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