1*beff2bacSKasper Nielsen# On macOS, system python binaries like /usr/bin/python and $(xcrun -f python3) 2*beff2bacSKasper Nielsen# are shims. They do some light validation work and then spawn the "real" python 3*beff2bacSKasper Nielsen# binary. Find the "real" python by asking dyld -- sys.executable reports the 4*beff2bacSKasper Nielsen# wrong thing more often than not. This is also useful when we're running under 5*beff2bacSKasper Nielsen# a Homebrew python3 binary, which also appears to be some kind of shim. 6*beff2bacSKasper Nielsendef getDarwinRealPythonExecutable(): 7*beff2bacSKasper Nielsen import ctypes 8*beff2bacSKasper Nielsen 9*beff2bacSKasper Nielsen dyld = ctypes.cdll.LoadLibrary("/usr/lib/system/libdyld.dylib") 10*beff2bacSKasper Nielsen namelen = ctypes.c_ulong(1024) 11*beff2bacSKasper Nielsen name = ctypes.create_string_buffer(b"\000", namelen.value) 12*beff2bacSKasper Nielsen dyld._NSGetExecutablePath(ctypes.byref(name), ctypes.byref(namelen)) 13*beff2bacSKasper Nielsen return name.value.decode("utf-8").strip() 14*beff2bacSKasper Nielsen 15*beff2bacSKasper Nielsen 16*beff2bacSKasper Nielsenprint(getDarwinRealPythonExecutable()) 17