I've searched and it seems this is called a list comprehension and similarly there seem to be set/dict comprehensions and generator expressions. But how does it work?

Here is how you would do this with a nested list comprehension: [[float(y) for y in x] for x in l] This would give you a list of lists, similar to what you started with except with floats instead of …

Create a dictionary with list comprehension in Python I like the Python list comprehension syntax. Can it be used to create dictionaries too? For example, by iterating over pairs of keys and …

Mar 1, 2014 · List comprehensions aren't magic that is inherently faster than a good old loop. As for functional list processing functions: While these are written in C and probably outperform …

Feb 2, 2014 · I have a list of lists, and would like to use list comprehension to apply a function to each element in the list of lists, but when I do this, I end up with one long list rather than my list …

Apr 23, 2012 · Multiple IF conditions in a python list comprehension [duplicate] Asked 13 years, 6 months ago Modified 4 years, 2 months ago Viewed 49k times

Feb 20, 2017 · Again, to re-iterate, all this already was added in Python 3.5 (see PEP 492), all that is new in Python 3.6 is that you can use such a loop in a list comprehension too. And in …

Jul 23, 2012 · Consider the following list comprehension [ (x,f(x)) for x in iterable if f(x) ] This filters the iterable based a condition f and returns the pairs of x,f(x). The problem with this approach …

How can we represent the elif logic in a list comprehension? Up until now, I have only used if and else in list comprehension, as in if/else in a list comprehension.

There is no built-in expression in Python that lets you ignore an exception (or return alternate values &c in case of exceptions), so it's impossible, literally speaking, to "handle exceptions in …