class Counter:
    def __init__(self):
        self.counter = 0

    def call_count(self):
        self.counter += 1
        return self.counter

c = Counter()

def get_num():
    return c.call_count()

def process(message, path):
    if message.text == "!v2-testing":
        return f"Testing successful - call number {get_num()}"