Why threading doesn't work in my Python script? [duplicate]

Question

I try to launch this code on my computer and threading doesn't work:

import threading


def infinite_loop():
    while 1 == 1:
        pass

def myname():
    print("chralabya")


t1 = threading.Thread(target=infinite_loop())
t2 = threading.Thread(target=myname())

t1.start()
t2.start()

When I execute this program myname() is never executed. Can someone can explain to me why threading doesn't work?

Not the original mistake, but related issue: stackoverflow.com/questions/1294382/… — moooeeeep
– moooeeeep, Commented Nov 18, 2022 at 11:59
myname is not executed because you are calling infinite_loop yourself which never returns. So execution never reaches the line t2 = threading.Thread(target=myname()) — Anwar Husain
– Anwar Husain, Commented Nov 18, 2022 at 12:10

Thomas · Accepted Answer · 2022-11-18 11:54:41Z

1

target=inifinite_loop() calls your function (note the ()) and assigns the result (which never comes) to the target parameter. That's not what you want!

Instead, you want to pass the function itself to the Thread constructor:

t1 = threading.Thread(target=infinite_loop)
t2 = threading.Thread(target=myname)

answered Nov 18, 2022 at 11:54

Thomas

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