/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 vote305 views1 answer
Django 3 create async rest api
Python Django
7 votes182 views2 answers
Numpy create a matrix of certain value
Python
0 vote177 views1 answer
Poetry python download windows
Python
1 vote178 views1 answer
Truncate add weird symbols in python
Python
2 votes184 views1 answer
Matplotlib bar label
Python
1 vote191 views1 answer
Plot specific columns pandas
Python
0 vote191 views1 answer
Iterating over the two ranges simultaneously and saving it in database
Python
1 vote197 views1 answer
How to import data from csv to jupyter notebook
Python
3 votes266 views2 answers
Python check if list
Python
0 vote184 views1 answer
Pie chart add outline python
Python