import os, psutil

def get_allocated_megabytes_per_app():
    pid_of_app = os.getpid()
    app_process = psutil.Process(pid_of_app)
    allocated_bytes = app_process.memory_info().rss
    allocated_megabytes = allocated_bytes / 1_000_000
    allocated_megabytes = round(allocated_megabytes, 3)
    return allocated_megabytes


class Test:

    @staticmethod
    def static():
        lst_2 = ["Hello world"*10000 for x in range(10000)]


Test.static()

print(get_allocated_megabytes_per_app())