反思python中的當前線程

Question

如何能夠接受當前線程對象？
考慮這個有點人爲的代碼片段。用例是不同的，但是爲了簡單起見，我已經熬下來的必要位

t1 = threading.Thread(target=func) 
t2 = threading.Thread(target=func) 

marked_thread_for_cancellation = t1 

t1.start() 
t2.start() 

def func(): 
    if [get_thread_obj] is marked_thread_for_cancellation: # <== introspect here 
     return 
    # do something 

Answer 1

可以使用thread.get_ident功能。與Thread.ident比較thread.get_ident()如下：

import thread 
import threading 
import time 

marked_thread_for_cancellation = None 

def func(identifier): 
    while threading.get_ident() != marked_thread_for_cancellation: 
     time.sleep(1) 
     print('{} is alive'.format(identifier)) 
    print('{} is dead'.format(identifier)) 

t1 = threading.Thread(target=func, args=(1,)) 
t2 = threading.Thread(target=func, args=(2,)) 
t1.start() 
t2.start() 
time.sleep(2) 
marked_thread_for_cancellation = t1.ident # Stop t1 

在Python 3，使用threading.get_ident。

您也可以使用自己的標識，而非thread.get_ident：

import threading 
import time 

marked_thread_for_cancellation = None 

def func(identifier): 
    while identifier != marked_thread_for_cancellation: 
     time.sleep(1) 
     print('{} is alive'.format(identifier)) 
    print('{} is dead'.format(identifier)) 

t1 = threading.Thread(target=func, args=(1,)) 
t2 = threading.Thread(target=func, args=(2,)) 
t1.start() 
t2.start() 
time.sleep(2) 
marked_thread_for_cancellation = 1 # Stop t1 (`1` is the identifier for t1) 

Answer 2

爲了使最小的改動你的代碼，這裏可能是你所追求的：

import threading 

def func(): 
    if threading.current_thread() is marked_thread_for_cancellation: # <== introspect here 
     print 'cancel' 
    else: 
     print 'otherwise' 

t1 = threading.Thread(target=func) 
t2 = threading.Thread(target=func) 

marked_thread_for_cancellation = t1 

t1.start() 
t2.start() 

但我不明白內省是什麼意思？所有線程共享marked_thread_for_cancellation，所有線程都有自己的一些本地數據，可通過threading.local()訪問。