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import ipaddress
def unwrap_ipv6(address):
# type: (str) -> str
if address.startswith('[') and address.endswith(']'):
return address[1:-1]
return address
def wrap_ipv6(address):
# type: (str) -> str
# We cannot assume it's already wrapped or even an IPv6 address if
# it's already wrapped it'll not pass (like if it's a hostname) and trigger
# the ValueError
try:
if ipaddress.ip_address(address).version == 6:
return f"[{address}]"
except ValueError:
pass
return address
def is_ipv6(address):
# type: (str) -> bool
address = unwrap_ipv6(address)
try:
return ipaddress.ip_address(address).version == 6
except ValueError:
return False