The first way works for a list or a string; the second way only works for a list, because slice assignment isn't allowed for strings. Other than that I think the only difference is speed: it looks like it's a little …

If your list of lists comes from a nested list comprehension, the problem can be solved more simply/directly by fixing the comprehension; please see How can I get a flat result from a list …

Since a list comprehension creates a list, it shouldn't be used if creating a list is not the goal; it shouldn't be used simply to write a one-line for-loop; so refrain from writing [print(x) for x in range(5)] for example.

Apr 4, 2009 · Closed 9 years ago. Is the a short syntax for joining a list of lists into a single list ( or iterator) in python? For example I have a list as follows and I want to iterate over a,b and c.

Apr 22, 2013 · The second action taken was to revert the accepted answer to its state before it was partway modified to address "determine if all elements in one list are in a second list".

Jan 12, 2009 · A List uses an internal array to handle its data, and automatically resizes the array when adding more elements to the List than its current capacity, which makes it more easy to use than an …

Jul 9, 2010 · How can I list all files of a directory in Python and add them to a list?

Feb 2, 2014 · The implementation uses a contiguous array of references to other objects, and keeps a pointer to this array. This makes indexing a list a [i] an operation whose cost is independent of the …

I'm looking for a quick way to create a list of values in C#. In Java I frequently use the snippet below:

Nov 15, 2012 · List is an Interface, you cannot instantiate an Interface, because interface is a convention, what methods should have your classes. In order to instantiate, you need some …