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Python FTW: Under the Hood

Be Careful With Chained Operations

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Chained operations can be tricky sometimes. Let’s check them out!

C++
print((False == False) in [False]) # makes sense
print(False == (False in [False])) # makes sense
print(False == False in [False]) # now what?

Now, take a look at this.

C++
print(True is False == False)
print(False is False is False)

How about this?

C++
print(1 > 0 < 1)
print((1 > 0) < 1)
print(1 > (0 < 1))

Explanation

As per the documentation

Formally, if a, b, c, …, y, z are expressions and op1, op2, ...