Beginner Python's Boolean type

and Operation : Only two Boolean values are true when the result is true.

True and True    # ==> truetrue and False   ==> Falsefalse and True   ==> falsefalse and false  ==> false

or Operation : evaluates to true as long as there is a Boolean value of true.

True or True    # ==> truetrue or False   ==> truefalse or True   ==>  TrueFalse or False  ==> false

Non-operation : Turns true to false, or false to true:

Not True   # ==> falsenot False  ==> Tru

Boolean operations are used in a computer to make conditional judgments, and the computer can automatically execute different follow-up code, depending on the result of the calculation as true or false.

In Python, Boolean types can also do and, or, and not with other data types, see the following code:

A ='a=t'a=f'

The result of the calculation is not a Boolean type, but the string ' a=t ', which is why?

Because Python regards 0 , 空字符串‘‘ and None is treated as False, other numeric values and non-empty strings are considered True, so:

True and ' a=t ' evaluates to ' a=t ' continue to calculate ' a=t ' or ' a=f ' results or ' a=t '

To explain the above results, it also involves an important law of the and and or operations: short-circuit calculation.

Beginner Python's Boolean type