Mar 8, 2011 · 16 Lambda is more of a concept or programming technique then anything else. Basically it's the idea that you get a function (a first-class object in python) returned as a result of another …

I saw some examples using built-in functions like sorted, sum etc. that use key=lambda. What does lambda mean here? How does it work? For the general computer science concept of a lambda, see …

After reading everything I can find on lambda expressions in Python, I still don't understand how to make it do what I want. Everyone uses the example: lambda x, y : x + y Why do you need to stat...

I don't know python (although it's definitely high on my to-learn list), so I'm wondering... is there really a good reason multiple lines aren't allowed for a lambda-expression? Why can't the body of the lambda …

I don't quite understand the syntax behind the sorted() argument: key=lambda variable: variable[0] Isn't lambda arbitrary? Why is variable stated twice in what looks like a dict?

An easy way to perform an if in lambda is by using list comprehension. You can't raise an exception in lambda, but this is a way in Python 3.x to do something close to your example:

I find the list comprehension much clearer than filter + lambda, but use whichever you find easier. There are two things that may slow down your use of filter. The first is the function call overhead: as soon …

Sep 4, 2012 · I'm curious about the difference between lambda function and a regular function (defined with def) - in the python level. (I know what is the difference for programmers and when to use each …

Python's lambda keyword: unnecessary, occasionally useful. If you find yourself doing anything remotely complex with it, put it away and define a real function.

May 31, 2013 · p = lambda x: (lambda x: x%2)(x)/2 Note in Python 2 this example will always return 0 since the remainder from dividing by 2 will be either 0 or 1 and integer-dividing that result by 2 will …