operator-if
New in version 2.5.
The if operator provides an inline if-then-else
expression, similar to the ternary ?: operator
used in C and similar languages.
Syntax:
expression if expression else expression
The expression x if C else y first evaluates C (not x); if C is true, x is evaluated and its value is returned; otherwise, y is evaluated and its value is returned.
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.
last updated 2 years ago by effbot #
The "in the contex of boolean operations" paragraph is repeated in lots of places. Replace with a shorter text and a link to a separate description (which should mention nonzero/len too).
effbot 2 years ago #