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" python 3# binary. Find the "real" python by asking dyld -- sys.executable reports the 4# wrong thing more often than not. This is also useful when we're running under 5# a Homebrew python3 binary, which also appears to be some kind of shim. 6def getDarwinRealPythonExecutable(): 7 import ctypes 8 dyld = ctypes.cdll.LoadLibrary('/usr/lib/system/libdyld.dylib') 9 namelen = ctypes.c_ulong(1024) 10 name = ctypes.create_string_buffer(b'\000', namelen.value) 11 dyld._NSGetExecutablePath(ctypes.byref(name), ctypes.byref(namelen)) 12 return name.value.decode('utf-8').strip() 13 14print(getDarwinRealPythonExecutable()) 15