Example Analysis of python Logic Operation and strange return value (not,and,or) problem

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First, the priority for and, or, and not is not > and > or.

The same priority is calculated from left to right.

Let's start with non-operations. Python's non-operations are nothing special compared to these languages. Not has only two return values, True and False. In Python, objects with false truth values, including False,None, the number 0, an empty string, and an empty container type. Any object other than that is true.

Then there is the and operation. The rules for the and (and) operation of Python are

If the expression on the left is true, the value of the expression on the right is returned

Otherwise, return the value of the expression on the left

Finally, the rules for Python OR (or) operations are

If the expression on the left is true, the value of the expression on the left is returned

Otherwise, return the value of the expression on the right

Feel it in code:

So now let's add priority-related hybrid operations:

# first of all, not has the highest priority, then not 8 returns False

# (False or 3 and 4 or 2 and 0 or 9 and 7)

# the next priority is and

# (False or 4 or 0 or)

# finally or returns a true value of 4

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