Question

How do I write a decorator that stores input for that function in a list and only calls the function after n is stored?

Answer 1

Calls func every 100,000 calls, use with @counter before you function:

def counter(func):
    def wrapper(val, *args, **kwargs):
        if val:
            wrapper.count = wrapper.count + 1
            if wrapper.count % 100000 == 0: # insert 100,000 at a time, should be speedier thanks to `.executemany()`
                to_logfile(str(wrapper.count) + '\n', 'counter2.log')
                return func(wrapper.valarr, *args, **kwargs)
            else:
                if len(wrapper.valarr)==1000000:
                    wrapper.vallarr = []
                wrapper.valarr.append([val])
                return
    wrapper.count = 0
    wrapper.valarr = []

    return wrapper

(feel free to suggest improvements)