/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

16 votes249 views6 answers
Python print function
Python
0 vote260 views1 answer
Python pandas in list
Python
12 votes295 views4 answers
Get index of all element in list python
Python
15 votes271 views2 answers
Python 3.9 beautifulsoup kurulumu
Python
0 vote271 views1 answer
Drop first column read_csv
Python
0 vote257 views1 answer
Get the factorial of a number on python
Python
10 votes254 views2 answers
Create dict from json file python
Python
69 votes280 views3 answers
Puthon for loop
Python
6 votes237 views1 answer
Pandas get entires that contain a string
Python
2 votes252 views2 answers
Timestamp e datetime python
Python