you could do something like that but i | adafruit | Page 1

noble valve Dec 16, 2022, 7:10 PM

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last_fired = getattr(cls, "exampleFunc1LastFiredTime", 0)
This line does not make sense to me, can you break it down to it's arguments? I'm struggling with the ,0, specifically

grave plinth Dec 16, 2022, 7:18 PM

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it's like the dict get(), the last argument is a default value

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>>> a = {}
>>> a["hello"]
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
KeyError: hello
>>> a.get("hello", 1515)
1515

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same with getattr

noble valve Dec 16, 2022, 7:22 PM

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so it attempts to pull the value examplefunc1LastFiredTime from the class attributes, and if that fails it sets it to 0?

grave plinth Dec 16, 2022, 7:23 PM

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it returns 0, it doesn't set the value

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the value gets set in the last line

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so that next time it doesn't return the default

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you could do that too, but I like that the default value skips the need to set the attribute in advance

if not hasattr(cls, "exampleFunc1LastFiredTime"):
    cls.exampleFunc1LastFiredTime = 0

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but I like to encapsulate the timing logic in a function as I showed with the its_time example, which also has the "token" (which replaces the variable name) being only in one place, less prone to typos

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but again, this might not require more memory, due to the use of less code:

class example:
    exampleFunc1LastFiredTime = 0
    @classmethod
    def exampleFunc1(cls):
        if time.monotonic() >= cls.exampleFunc1LastFiredTime + TIMEOUT:
            print("exampleFunc1 Fired", time.monotonic())
            cls.exampleFunc1LastFiredTime = time.monotonic()

    exampleFunc2LastFiredTime = 0
    @classmethod
    def exampleFunc2(cls):
        if time.monotonic() >= cls.exampleFunc2LastFiredTime + TIMEOUT:
            print("exampleFunc2 Fired", time.monotonic())
            cls.exampleFunc2LastFiredTime = time.monotonic()

#you could do something like that but i