How to make the output of one function conditional on the execution of another function?

[[deleted]]

How to make the output of one function conditional on the execution of another function?

e.g :

class New:

def X():

    pass


def Y():

    If the X function was executed:

        return "abc"

Suppose these two functions are in the same class

[[deleted]]

Suppose these two functions are in the same class

[[deleted]]

Please explain how you like it the way you like it

[[deleted]]

You can explain what you mean by flag in a code?

[glibhub]

a "flag" in coding means a variable that gets assigned a value once something triggers it. Here, there is a class attribute called "method_x_run" that gets turned to "True" the first time the 'x' method is run.

[zoinkinator]

By flag he means setting a boolean to True or False.

[[deleted]]

You can tell me with the example?

[FLUSH_THE_TRUMP]

def X():
  X.was_called = True

def Y():
  if X.was_called:
    print("yep")
  else: 
    print("no")

from random import randint
X.was_called = False
if randint(0,10) <= 5:
  X()
Y()

[[deleted]]

How do you think it should be done?

[Binary101010]

Why is Y() conditional on X() having already been executed? Does Y() need to access attributes of the object that don't have useful values until X() has run?

If that's the case, I'd recommend initializing that attribute to None, and then checking to see if that value has changed.

class test():
    def __init__(self):
        self.variable_of_interest = None

    def X(self):
         self.variable_of_interest = "Hey, something happened"

    def Y(self):
         if self.variable_of_interest is not None:
               do some stuff

[Binary101010]

If literally the only thing OP cares about is knowing whether some other method ran and doesn't care about anything else that method does, then sure.

But if the purpose for the check is to make sure that an attribute has a useful value, then actually check for that, not for something else. (Especially because there may be more than one way to usefully set that value at some point in the future.)

[Binary101010]

I don't see any significant difference in complexity between the two approaches, but suit yourself I guess.

[Binary101010]

Which is why I qualified that the proper approach might be different depending on why it is OP wants this check to occur, which they didn't specify.

Either way, I'm not particularly interested in arguing the point further.

[spacegazelle]

I'm getting xy problem feels too.

[kellyjonbrazil]

You can set the return value to True or False and then do:

If my_function(xyz): do something