https://docs.python.org/3/library/threading.html

California State University, San Bernardino

Here is a simple example of using threads to print a string.

```python 
import threading

def f():
    print("Hello World!", threading.currentThread().getName())

if __name__ == '__main__':
    threads = [threading.Thread(target=f) for x in range(3)
    # Creates list of threads -> [Thread-1, Thread-2, Thread-3]
    for i in threads:
        i.start()
    for i in threads:
        i.join()
```

The .start() method signals the thread to begin execution. Alternatively, the .join() method signals for the thread to stop once it is done executing the function. The code above printed:
```
Hello World! Thread-1
Hello World! Thread-2
Hello World! Thread-3
```

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