Core Python Programming (2nd Edition)

Table 4.3. Standard Type Boolean Operators
Operator Function
not expr Logical NOT of expr (negation)
expr1 and expr2 Logical AND of expr1 and expr2 (conjunction)
expr1 orexpr2 Logical OR of expr1 and expr2 (disjunction)
>>> x, y = 3.1415926536, -1024
>>> x < 5.0
True
>>> not (x < 5.0)
False
>>> (x < 5.0) or (y > 2.718281828)
True
>>> (x < 5.0) and (y > 2.718281828)
False
>>> not (x is y)
True
Earlier, we introduced the notion that Python supports multiple comparisons within one expression.
These expressions have an implicit and operator joining them together.
>>> 3 < 4 < 7 # same as "( 3 < 4 ) and ( 4 < 7 )"
True