function – Page 14 – Tarik Billa

How to use a variable defined inside one function from another function?

November 23, 2023 by Tarik

One approach would be to make oneFunction return the word so that you can use oneFunction instead of word in anotherFunction : def oneFunction(lists): category = random.choice(list(lists.keys())) return random.choice(lists[category]) def anotherFunction(): for letter in oneFunction(lists): print(“_”, end=” “) Another approach is making anotherFunction accept word as a parameter which you can pass from the result … Read more

How to implement a “private/restricted” function in C?

November 22, 2023 by Tarik

Here’s one way: int f_real_name(void) { … } #define f f_real_name int g(void) { // call f() } #undef f // calling f() now won’t work Another way, if you can guarantee that f() and g() are the only functions in the file, is to declare f() as static. EDIT: Another macro trick to cause … Read more

How can I get the return value of a function passed to multiprocessing.Process?

October 27, 2023 by Tarik

Use a shared variable to communicate. For example, like this, Example Code: import multiprocessing def worker(procnum, return_dict): “””worker function””” print(str(procnum) + ” represent!”) return_dict[procnum] = procnum if __name__ == “__main__”: manager = multiprocessing.Manager() return_dict = manager.dict() jobs = [] for i in range(5): p = multiprocessing.Process(target=worker, args=(i, return_dict)) jobs.append(p) p.start() for proc in jobs: proc.join() … Read more

Apply function with two arguments to columns

October 11, 2023 by Tarik

Why not just do this? df[‘NewCol’] = df.apply(lambda x: segmentMatch(x[‘TimeCol’], x[‘ResponseCol’]), axis=1) Rather than trying to pass the column as an argument as in your example, we now simply pass the appropriate entries in each row as argument, and store the result in ‘NewCol’.

What’s the significance of a C function declaration in parentheses apparently forever calling itself?

October 9, 2023 by Tarik

The function name g_atomic_int_compare_and_exchange_full is in parentheses. What’s the significance of this? Putting a function name in brackets avoids any macro expansion in case there is a function like macro with the same name. That means, g_atomic_int_compare_and_exchange_full(…) will use the macro while (g_atomic_int_compare_and_exchange_full)(…) will use the function. Why is this used? You cannot assign a … Read more

What is & How to use getattr() in Python?

October 2, 2023 by Tarik

Objects in Python can have attributes — data attributes and functions to work with those (methods). Actually, every object has built-in attributes (try dir(None), dir(True), dir(…), dir(dir) in Python console). For example you have an object person, that has several attributes: name, gender, etc. You access these attributes (be it methods or data objects) usually … Read more

what is the difference between return and break in python?

September 28, 2023 by Tarik

break is used to end a loop prematurely while return is the keyword used to pass back a return value to the caller of the function. If it is used without an argument it simply ends the function and returns to where the code was executing previously. There are situations where they can serve the … Read more

Fixing the PHP empty function

September 27, 2023 by Tarik

Python: replacing a function within a class of a module

September 26, 2023 by Tarik

I suggest 4 solutions, from the worst to the best (IMHO), but of course it also depends on your specific constraints: Replace the instance method (1): I use the fact that functions are descriptors in Python, so that I can use the __get__ method on AlternativeFunc to get it as a method of the instance … Read more