Charles-François Natali added the comment:
The culprint isn't Python, but the libc:
"""
$ ./python -c "import socket; print(socket.getaddrinfo('836937931829', 80,
socket.AF_INET, 0, socket.SOL_TCP))"
Traceback (most recent call last):
File "<string>", line 1, in <module>
socket.gaierror: [Errno -2] Name or service not known
"""
But with AF_UNSPEC:
"""
$ ./python -c "import socket; print(socket.getaddrinfo('836937931829', 80,
socket.AF_UNSPEC, 0, socket.SOL_TCP))"
[(2, 1, 6, '', ('172.17.10.54', 80))]
"""
And gdb confirms that the arguments are correctly passed to the libc:
"""
$ gdb --args ./python -c "import socket;
print(socket.getaddrinfo('836937931829', 80, socket.AF_INET, 0,
socket.SOL_TCP))"
Breakpoint 1, __GI_getaddrinfo (name=0xb7cc9c84 "836937931829",
service=0xbffff24e "80", hints=0xbffff278, pai=0xbffff274) at
../sysdeps/posix/getaddrinfo.c:2379
(gdb) p *hints
$4 = {ai_flags = 0, ai_family = 2, ai_socktype = 0, ai_protocol = 6, ai_addrlen
= 0, ai_addr = 0x0, ai_canonname = 0x0, ai_next = 0x0}
"""
You can also check directly with getaddrinfo(3).
----------
nosy: +neologix
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<http://bugs.python.org/issue20418>
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