Returns the first operand that evaluates to True or the last one if all are False.

A or B

A

Any valid object.

B

Any valid object.

#TODO

#TODO

In the context of Boolean operations, and also when expressions are used by control flow statements, the following values are interpreted as false: False, None, numeric zero of all types, and empty strings and containers (including strings, tuples, lists, dictionaries, sets and frozensets). All other values are interpreted as true. (See the __nonzero__() special method for a way to change this.)

The expression:

>>> x or y

first evaluates x; if x is true, its value is returned; otherwise, y is evaluated and the resulting value is returned.

>>> 0 or '' or False
False
>>> 1 or '' or False
1
>>> 1 or 'A' or False
1
>>> 1 or 2 or 3
1

>>> b = '' or 'ABCD'
>>> b
'ABCD'
>>> b = 0 or 1
>>> b
1

#TODO