Malcolm Smith <malcolm.sm...@gmail.com> added the comment:
This isn't documented, but CDLL(None) is translated to dlopen(NULL), which "causes a search for a symbol in the main program, followed by all shared libraries loaded at program startup, and then all shared libraries loaded by dlopen() with the flag RTLD_GLOBAL" (https://linux.die.net/man/3/dlopen). This is sometimes useful because it lets you look up a symbol in an already-loaded library without needing to give the library's name. For example: >>> import ctypes >>> dll = ctypes.CDLL(None) >>> dll.printf <_FuncPtr object at 0x7f3427d547c0> >>> dll.PyObject_Str <_FuncPtr object at 0x7f3427d54880> ---------- nosy: +Malcolm Smith _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue34592> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
