From 43c1add90d441caeb31362214666b0133245e977 Mon Sep 17 00:00:00 2001 From: Mark Pilgrim Date: Sat, 16 May 2009 01:30:45 -0400 Subject: [PATCH] Added devilish [False] example to show that lists in a boolean context are only based on length [thanks A.H.] --- native-datatypes.html | 3 +++ 1 file changed, 3 insertions(+) diff --git a/native-datatypes.html b/native-datatypes.html index 36d5da7..e00705f 100644 --- a/native-datatypes.html +++ b/native-datatypes.html @@ -315,9 +315,12 @@ ValueError: list.index(x): x not in list no, it's false >>> is_it_true(['a']) ③ yes, it's true +>>> is_it_true([False]) ④ +yes, it's true
  1. In a boolean context, an empty list is false.
  2. Any list with at least one item is true. +
  3. Any list with at least one item is true. The value of the items is irrelevant.