How do I achieve the effect of the === operator in Python?

Question

How do I achieve the effect of the === operator in Python?

For example, I don\'t want False == 0 to be True.

Answer 1

Try variable is False. False is 0 returns False,

Answer 2

You can use the is operator to check for object identity. False is 0 will return False then.

Answer 3

Going with the Mathematica definition, here's a small function to do the job. Season delta to taste:

def SameQ(pram1, pram2, delta=0.0000001):
    if type(pram1) == type(pram2):
        if pram1 == pram2:
            return True
        try:
            if abs(pram1 - pram2) <= delta:
                return True
        except Exception:
            pass
    return False

Answer 4

If you want to check that the value and type are the same use:

x == y and type(x) == type(y)

In Python, explicit type comparisons like this are usually avoided, but because booleans are a subclass of integers it's the only choice here.

---

x is y compares identity—whether two names refer to the same object in memory. The Python boolean values are singletons so this will work when comparing them, but won't work for most types.