Str not callable

Question

I am using threading to speed up my processes, but it says my thread is not callable. Code:

thread1 = threading.Thread(target=next_word())
thread2 = threading.Thread(target=get_word())
thread1.start()
thread2.start()

The error is this:

Exception in thread Thread-1: Traceback (most recent call last): File "C:\Users\Tom\AppData\Local\Programs\Python\Python35\lib\threading.py", line 914, in _bootstrap_inner self.run() File "C:\Users\Tom\AppData\Local\Programs\Python\Python35\lib\threading.py", line 862, in run self._target(*self._args, **self._kwargs) TypeError: 'str' object is not callable

I do not know what is wrong with my code, if you can help at all that will be great. I know there is two errors, but they are the same so by fixing one, the other can be fixed. Thank you in advance.

Answer 1

You are expected to give a function for Thread as target.

While next_word is a function, next_word() is not. Instead, it is the result of the function, that is probably a string.

So what is happening is your Thread will call next_word()(), i.e "a string"() which obviously doesn't make sense since a string can't be called, hence your TypeError: 'str' object is not callable.

Fix :

thread1 = threading.Thread(target=next_word)
thread2 = threading.Thread(target=get_word)
thread1.start()
thread2.start()