Thread local storage in Python

Question

How do I use thread local storage in Python?

Related

• What is “thread local storage” in Python, and why do I need it? - This thread appears to be focuse

Answer 1

My way of doing a thread local storage across modules / files. The following has been tested in Python 3.5 -

import threading
from threading import current_thread

# fileA.py 
def functionOne:
    thread = Thread(target = fileB.functionTwo)
    thread.start()

#fileB.py
def functionTwo():
    currentThread = threading.current_thread()
    dictionary = currentThread.__dict__
    dictionary["localVar1"] = "store here"   #Thread local Storage
    fileC.function3()

#fileC.py
def function3():
    currentThread = threading.current_thread()
    dictionary = currentThread.__dict__
    print (dictionary["localVar1"])           #Access thread local Storage

In fileA, I start a thread which has a target function in another module/file.

In fileB, I set a local variable I want in that thread.

In fileC, I access the thread local variable of the current thread.

Additionally, just print 'dictionary' variable so that you can see the default values available, like kwargs, args, etc.