ipaddress.ip_{address,network,interface} raises TypeError instead of ValueError if given a tuple as address

[thomascellerier]

BPO	46415
Nosy	@JelleZijlstra, @thomascellerier
PRs	bpo-46415: Use f-string for ValueError in ipaddress.ip_{address,network,interface} helper functions #30642

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

Show more details

GitHub fields:

assignee = None
closed_at = <Date 2022-01-21.04:53:15.129>
created_at = <Date 2022-01-17.15:21:20.696>
labels = ['3.8', 'type-bug', 'library']
title = 'ipaddress.ip_{address,network,interface} raises TypeError instead of ValueError if given a tuple as address'
updated_at = <Date 2022-01-21.04:53:15.128>
user = 'https://github.com/thomascellerier'

bugs.python.org fields:

activity = <Date 2022-01-21.04:53:15.128>
actor = 'JelleZijlstra'
assignee = 'none'
closed = True
closed_date = <Date 2022-01-21.04:53:15.129>
closer = 'JelleZijlstra'
components = ['Library (Lib)']
creation = <Date 2022-01-17.15:21:20.696>
creator = 'thomascellerier'
dependencies = []
files = []
hgrepos = []
issue_num = 46415
keywords = ['patch']
message_count = 2.0
messages = ['410798', '411081']
nosy_count = 2.0
nosy_names = ['JelleZijlstra', 'thomascellerier']
pr_nums = ['30642']
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue46415'
versions = ['Python 3.8']

[thomascellerier]

IPv*Network and IPv*Interface constructors accept a 2-tuple of (address description, netmask) as the address parameter.
When the tuple-based address is used errors are not propagated correctly through the ipaddress.ip_* helper because of the %-formatting now expecting several arguments:

In [7]: ipaddress.ip_network(("192.168.100.0", "fooo"))
\---------------------------------------------------------------------------

	TypeError                                 Traceback (most recent call last)
	<ipython-input-7-7fc0bff07012> in <module>
	----> 1 ipaddress.ip_network(("192.168.100.0", "fooo"))

/usr/lib/python3.8/ipaddress.py in ip_network(address, strict)
     81         pass
     82
---\> 83     raise ValueError('%r does not appear to be an IPv4 or IPv6 network' %
     84                      address)
     85

TypeError: not all arguments converted during string formatting

Compared to:

In [8]: ipaddress.IPv4Network(("192.168.100.0", "foo"))
\---------------------------------------------------------------------------

	NetmaskValueError                         Traceback (most recent call last)
	<ipython-input-8-79078758e653> in <module>
	----> 1 ipaddress.IPv4Network(("192.168.100.0", "foo"))

/usr/lib/python3.8/ipaddress.py in \_\_init__(self, address, strict)
   1453
   1454         self.network_address = IPv4Address(addr)
-\> 1455         self.netmask, self.\_prefixlen = self.\_make_netmask(mask)
   1456         packed = int(self.network_address)
   1457         if packed & int(self.netmask) != packed:

/usr/lib/python3.8/ipaddress.py in \_make_netmask(cls, arg)
   1118                     # Check for a netmask or hostmask in dotted-quad form.
   1119                     # This may raise NetmaskValueError.
-\> 1120                     prefixlen = cls.\_prefix_from_ip_string(arg)
   1121             netmask = IPv4Address(cls.\_ip_int_from_prefix(prefixlen))
   1122             cls.\_netmask_cache[arg] = netmask, prefixlen

/usr/lib/python3.8/ipaddress.py in \_prefix_from_ip_string(cls, ip_str)
    516             ip_int = cls.\_ip_int_from_string(ip_str)
    517         except AddressValueError:
--\> 518             cls.\_report_invalid_netmask(ip_str)
    519
    520         # Try matching a netmask (this would be /1\*0*/ as a bitwise regexp).

/usr/lib/python3.8/ipaddress.py in \_report_invalid_netmask(cls, netmask_str)
    472     def \_report_invalid_netmask(cls, netmask_str):
    473         msg = '%r is not a valid netmask' % netmask_str
--\> 474         raise NetmaskValueError(msg) from None
    475
    476     @classmethod

NetmaskValueError: 'foo' is not a valid netmask

[JelleZijlstra]

Duplicate of bpo-46141.