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Lambdas in Python
In Lambda Calculus, lambda abstractions (functions) are defined as functions that relate one variable to another. So in Python, a Lambda is a single or inline definition of the functionllity of a transformation of one (or more) objects into another (one or more) objects. On our main website, you'll find both an example of the use of a Lambda function in use and an example showing how the same is achieved without a lambda (written 2005-05-06, updated 2006-06-05) Associated topics are indexed under Y105 - Python - Functions, Modules and Packages[4029] Exception, Lambda, Generator, Slice, Dict - examples in one Python program - (2013-03-04) [3945] vargs in Python - how to call a method with unknown number of parameters - (2012-12-06) [3931] Optional positional and named parameters in Python - (2012-11-23) [3885] Default local - a good choice by the author of Python - (2012-10-08) [3852] Static variables in Python? - (2012-08-29) [3766] Python timing - when to use a list, and when to use a generator - (2012-06-16) [3695] Functions are first class variables in Lua and Python - (2012-04-13) [3662] Finding all the unique lines in a file, using Python or Perl - (2012-03-20) [3474] Python Packages - groupings of modules. An introduction - (2011-10-11) [3472] Static variables in functions - and better ways using objects - (2011-10-10) [3464] Passing optional and named parameters to python methods - (2011-10-04) [3459] Catching the fishes first? - (2011-09-27) [3280] Passing parameters to Python functions - the options you have - (2011-05-07) [3159] Returning multiple values from a function call in various languages - a comparison - (2011-02-06) [2998] Using an exception to initialise a static variable in a Python function / method - (2010-10-13) [2994] Python - some common questions answered in code examples - (2010-10-10) [2929] Passing a variable number of parameters in to a function / method - (2010-08-20) [2878] Program for reliability and efficiency - do not duplicate, but rather share and re-use - (2010-07-19) [2766] Optional and named parameters to Python functions/methods - (2010-05-15) [2718] Python - access to variables in the outer scope - (2010-04-12) [2520] Global and Enable - two misused words! - (2009-11-30) [2506] Good example of recursion in Python - analyse an RSS feed - (2009-11-18) [2481] Sample code with errors in it on our web site - (2009-10-29) [2440] Optional parameters to Python functions - (2009-10-07) [2439] Multiple returns from a function in Python - (2009-10-06) [2011] Conversion of OSI grid references to Eastings and Northings - (2009-01-28) [1879] Dynamic code - Python - (2008-11-11) [1871] Optional and named parameters in Python - (2008-11-05) [1870] What to do with a huge crop of apples - (2008-11-04) [1869] Anonymous functions (lambdas) and map in Python - (2008-11-04) [1790] Sharing variables with functions, but keeping them local too - Python - (2008-09-09) [1784] Global - Tcl, PHP, Python - (2008-09-03) [1464] Python Script - easy examples of lots of basics - (2007-12-08) [1202] Returning multiple values from a function (Perl, PHP, Python) - (2007-05-24) [1163] A better alternative to cutting and pasting code - (2007-04-26) [1134] Function / method parameters with * and ** in Python - (2007-04-04) [959] It's the 1st, not the 1nd 1rd or 1th. - (2006-12-01) [949] Sludge off the mountain, and Python and PHP - (2006-11-27) [913] Python - A list of methods - (2006-11-03) [912] Recursion in Python - (2006-11-02) [900] Python - function v method - (2006-10-20) [821] Dynamic functions and names - Python - (2006-08-03) [775] Do not duplicate your code - (2006-06-23) [749] Cottage industry or production line data handling methods - (2006-06-07) [745] Python modules. The distribution, The Cheese Shop and the Vaults of Parnassus. - (2006-06-05) [668] Python - block insets help with documentation - (2006-04-04) [561] Python's Generator functions - (2006-01-11) [418] Difference between import and from in Python - (2005-08-18) [386] What is a callback? - (2005-07-22) [340] Code and code maintainance efficiency - (2005-06-08) [308] Call by name v call by value - (2005-05-11) [294] Python generator functions, lambdas, and iterators - (2005-04-28) [105] Distance Learning - (2004-10-31) [96] Variable Scope - (2004-10-22) 559d
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