Python run a block of code in a background thread immediately

thread_start_immed.py

import threading


def thread_start_immed(*args, _threading_daemon=True, **kwargs):
    """Usage:
    
        @thread_start_immed("my background thread", _threading_daemon=False)
        def t(name):
            import time
            time.sleep(3)
            print(f"Hello from {name}!")
        
        print("Started background thread:", t)
    """
    # explicitly denoting objects to be transferred to the thread by passing them as arguments
    # can make developer intent far more explicit than relying on implicit closure bindings
    return lambda f: _start_thread(target=f, args=args, kwargs=kwargs, daemon=_threading_daemon)


def _start_thread(*args, **kwargs):
    t = threading.Thread(*a, **kwargs)
    t.start()
    return t