获取进程ID

import os

pid = os.getpid()

获取线程ID

获取线程对象标记：threading.ident

threading 对象的标识 ident，而并非系统线程ID

import threading

tid = threading.currentThread().ident

获取系统的线程ID

import ctypes

SYS_gettid = 186
libc = ctypes.cdll.LoadLibrary('libc.so.6')
tid = libc.syscall(SYS_gettid)