New submission from Dima Tisnek <dim...@gmail.com>: Somehow, it turns out that `TCP_NOTSENT_LOWAT` that's available since 3.7.x is not available in the official macOS builds 🙀:
> python3.7 Python 3.7.4 (v3.7.4:e09359112e, Jul 8 2019, 14:54:52) [Clang 6.0 (clang-600.0.57)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import socket >>> socket.TCP_NOTSENT_LOWAT Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: module 'socket' has no attribute 'TCP_NOTSENT_LOWAT' > python3.8 Python 3.8.2 (v3.8.2:7b3ab5921f, Feb 24 2020, 17:52:18) [Clang 6.0 (clang-600.0.57)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import socket >>> socket.TCP_NOTSENT_LOWAT Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: module 'socket' has no attribute 'TCP_NOTSENT_LOWAT' > python3.9 Python 3.9.0a4 (v3.9.0a4:6e02691f30, Feb 25 2020, 18:14:13) [Clang 6.0 (clang-600.0.57)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import socket >>> socket.TCP_NOTSENT_LOWAT Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: module 'socket' has no attribute 'TCP_NOTSENT_LOWAT' And my local build has it 😺: > ~/cpython/python.exe Python 3.9.0a4+ (heads/master:be501ca241, Mar 4 2020, 15:16:49) [Clang 10.0.1 (clang-1001.0.46.4)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import socket >>> socket.TCP_NOTSENT_LOWAT 513 So... my guess is official builds are using old SDK or header files. 🤔 My system has it e.g. here: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/System/Library/Frameworks/Kernel.framework/Versions/A/Headers/netinet/tcp.h 230:#define TCP_NOTSENT_LOWAT 0x201 /* Low water mark for TCP unsent data */ And in fact it's present in every `netinet/tcp.h` on my system: CommandLineTools 10.14 and 10.5 sdks; MacOSX dev sdk, {AppleTV,Watch,iPhone}{OS,Simulator} sdks. ---------- components: Extension Modules messages: 364984 nosy: Dima.Tisnek, Mariatta, njs priority: normal severity: normal status: open title: socket.TCP_NOTSENT_LOWAT is missing in official macOS builds versions: Python 3.7, Python 3.8, Python 3.9 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue40060> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com