Python Threading

Master the art of threading in Python.

A guide to learn threading, one of the advance topics in Programming.

Photo by Grzegorz Walczak on Unsplash

Before getting into threading we need to know what a thread is?

A thread is a separate flow of execution. A program can have multiple threads running concurrently, which can be used to perform tasks in parallel.

Threading is a technique for executing multiple threads concurrently within a single process. In Python, the threading module is built on top of the lower-level _thread module, which is built on top of even lower-level thread module.

Threading can be useful in a variety of situations, such as improving the performance of certain types of programs by allowing them to run tasks in parallel or creating a responsive user interface by running tasks in the background.

Here is an example of how to use the threading module to create and start a new thread:

import threading

def some_function():
    # code to be executed by the thread
    print("I am a thread")

# create a thread
thread = threading.Thread(target=some_function)

# start the thread
thread.start()

You can also pass arguments to the thread’s target function by using the args parameter:

import threading

def some_function(arg1, arg2):
    # code to be executed by the thread
    print(f"I am a thread with arguments: {arg1}, {arg2}")

# create a thread
thread = threading.Thread(target=some_function, args=(1, 2))

# start the thread
thread.start()

To wait for a thread to complete before moving on to the next line of code, you can use the join method:

import threading

def some_function():
    # code to be executed by the thread
    print("I am a thread")

# create a thread
thread = threading.Thread(target=some_function)

# start the thread
thread.start()

# wait for the thread to complete
thread.join()

# continue with the next line of code
print("Thread has completed")

You can also use the threading module to create a threading timer, which will execute a function after a certain amount of time has passed:

import threading

def some_function():
    # code to be executed by the timer
    print("I am a timer")

# create a timer that will execute some_function in 5 seconds
timer = threading.Timer(5.0, some_function)

# start the timer
timer.start()

I hope this gives you a basic understanding of how to use the threading module in Python! There are many more features and options available, so be sure to check out the documentation for more information.

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