17 lines · python
1# On macOS, system python binaries like /usr/bin/python and $(xcrun -f python3)2# are shims. They do some light validation work and then spawn the "real" python3# binary. Find the "real" python by asking dyld -- sys.executable reports the4# wrong thing more often than not. This is also useful when we're running under5# a Homebrew python3 binary, which also appears to be some kind of shim.6def getDarwinRealPythonExecutable():7 import ctypes8 9 dyld = ctypes.cdll.LoadLibrary("/usr/lib/system/libdyld.dylib")10 namelen = ctypes.c_ulong(1024)11 name = ctypes.create_string_buffer(b"\000", namelen.value)12 dyld._NSGetExecutablePath(ctypes.byref(name), ctypes.byref(namelen))13 return name.value.decode("utf-8").strip()14 15 16print(getDarwinRealPythonExecutable())17