/Python/Global variable not accessible withing thread

Global variable not accessible withing thread

from threading import Thread
from queue import Queue
import time

def thread1(threadname, q):
    #read variable "a" modify by thread 2
    while True:
        a = q.get()
        if a is None: return # Poison pill
        print a

def thread2(threadname, q):
    a = 0
    for _ in xrange(10):
        a += 1
        q.put(a)
        time.sleep(1)
    q.put(None) # Poison pill

queue = Queue()
thread1 = Thread( target=thread1, args=("Thread-1", queue) )
thread2 = Thread( target=thread2, args=("Thread-2", queue) )

thread1.start()
thread2.start()
thread1.join()
thread2.join()

Source: stackoverflow.com

Similar codes

2 votes316 views1 answer
Removing punctuation with NLTK in Python
Python
1 vote315 views1 answer
Staticfiles
Python
1 vote314 views1 answer
Maximo numero de variables dentro de un .def python
Python
2 votes328 views6 answers
Variables in python
Python
0 vote311 views1 answer
Matplotlib show two distinct plots
Python
76 votes326 views6 answers
Select a random element from a list python
Python
0 vote311 views1 answer
Python count distinct letters
Python
0 vote350 views1 answer
Pipenv installs
Python
2 votes336 views3 answers
Get queryset
Python
1 vote331 views1 answer
Django text area limit characters
Python