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 …

Mar 8, 2011 · Lambda is an anonymous function in Python programming language, instead of bearing a def statement in the front it is simply called and written lambda. def mult2(x):

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:

Invalid comparison. First, you are not passing a lambda function to the filter version, which makes it default to the identity function. When defining if not None in the list comprehension you are …

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?

Lambda functions are most useful in things like callback functions, or places in which you need a throwaway function. JAB's example is perfect - It would be better accompanied by the keyword …

To limit the number of concurrent invocations of an AWS Lambda function, you can use the maximum concurrency feature for Lambda event source mappings. This is an attribute of the …

May 28, 2016 · I heartily wish there were an aws cli or web interface to fix this. aws add-access "AccessDeniedException: User: ARN... is not authorized to perform: ACTION on resource: …

Nov 28, 2012 · In Java 8, methods can be created as Lambda expressions and can be passed by reference (with a little work under the hood). There are plenty of examples online with lambdas …

Jan 10, 2014 · A lambda function (or more accurately, a lambda expression) is simply a function you can define on-the-spot, right where you need it. For example, f = lambda x: x * 2 is exactly …