/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

0 vote259 views1 answer
Template tag django
Python Django
0 vote313 views1 answer
Inspectdb django
Python Django
0 vote244 views1 answer
Pandas drop rows with empty list
Python
0 vote236 views2 answers
Leer fichero de texto con columnas como diccionario python
Python
0 vote211 views1 answer
Gtk entry focus python
Python
1 vote226 views1 answer
Wxpython custom dialog
Python
-2 votes227 views6 answers
Django download
Python
3 votes248 views2 answers
Spark add column to dataframe
Python
2 votes238 views5 answers
Python xml parser
Python
0 vote244 views1 answer
Python add new line from textarea
Python