Anything with a non-zero length is true, empty sequences are false : Boolean « Data Type « Python

Python 1.  2D 2.  Application 3.  Buildin Function 4.  Class 5.  Data Structure 6.  Data Type 7.  Database 8.  Development 9.  Dictionary 10.  Event 11.  Exception 12.  File 13.  Function 14.  GUI Pmw 15.  GUI Tk 16.  Language Basics 17.  List 18.  Math 19.  Network 20.  String 21.  System 22.  Thread 23.  Tuple 24.  Utility 25.  XML Java Java Tutorial Java Source Code / Java Documentation Java Open Source Jar File Download Java Articles Java Products Java by API Photoshop Tutorials Maya Tutorials Flash Tutorials 3ds-Max Tutorials Illustrator Tutorials GIMP Tutorials C# / C Sharp C# / CSharp Tutorial C# / CSharp Open Source ASP.Net ASP.NET Tutorial JavaScript DHTML JavaScript Tutorial JavaScript Reference HTML / CSS HTML CSS Reference C / ANSI-C C Tutorial C++ C++ Tutorial Ruby PHP Python Tutorial Python Open Source SQL Server / T-SQL SQL Server / T-SQL Tutorial Oracle PL / SQL Oracle PL/SQL Tutorial PostgreSQL SQL / MySQL MySQL Tutorial VB.Net VB.Net Tutorial Flash / Flex / ActionScript VBA / Excel / Access / Word XML XML Tutorial Microsoft Office PowerPoint 2007 Tutorial Microsoft Office Excel 2007 Tutorial Microsoft Office Word 2007 Tutorial

Python » Data Type » Boolean Screenshots  Anything with a non-zero length is true, empty sequences are false if []:    print "empty."    if [1]:    print "not empty."    if ():    print "empty."    if (1):    print "not empty." if {}:    print "empty."    if {1:0}:    print "not empty."                     Related examples in the same category 1.  Boolean operation in if 2.  In Python any non-zero integer value is true; zero is false.