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pythonlistvariables

Function trigger when a variable change

I'm trying to write a single funcion that turn to true when a variable changes. The script should put the variable in a list and check if it changes. Now, i need to call the function in another loop, so the script have to do one cicle when invoked for i in range(0, 1) Anyway the function doesnt works and the output is always false...any suggestions?
(NOOB)

def change():
    v1 = []
    for i in range(0, 1):
        v1.insert(0, get.value()) #get.value gaves a value when invoked
        if len(v1) > 2:
            if v1[0] != v1[1]:
                v1.clear()
                v1.insert(0, get.value())
                return True
            else:
                return False
Solution

  • You've made this harder than it needs to be. Just store the value you know and wait for it to change.

    def change():
    v1 = get.value()
    while get.value() == v1:
        time.sleep(0.5)
    return True

    You need the sleep in there, otherwise this will consume 100% of the CPU and your other code won't run. Remember this ONLY works in a thread, which means it's probably not what you really need.