Python has supported the key= for .sort since 2.4, that is year 2004, it does the Schwartzian transform within the sorting code, in C; thus this method is useful only on Pythons 2.0-2.3. all of which are more …

Sep 22, 2010 · 15 You're trying to use key functions with lambda functions. Python and other languages like C# or F# use lambda functions. Also, when it comes to key functions and according to the …

I have a list of Python objects that I want to sort by a specific attribute of each object:

Mar 5, 2009 · In Python 3.6+ dictionaries preserve insertion order. This is, of course, not the same as possibility of sorting them by value, but on the other hand it is no longer valid to say that "dictionary …

Jun 17, 2013 · Suppose I have a dataframe with columns a, b and c. I want to sort the dataframe by column b in ascending order, and by column c in descending order. How do I do this?

Since Python 3.7, dicts keep insertion order. So if you want to order a set but still want to be able to do membership checks in constant time, you can create a dictionary from the sorted list using …

Oct 4, 2009 · What algorithm is the built in sort() method in Python using? Is it possible to have a look at the code for that method?

Jan 26, 2017 · There are a number of Python modules that provide dictionary implementations which automatically maintain the keys in sorted order. Consider the sortedcontainers module which is pure …

Aug 30, 2008 · 8 But how does this handle language specific sorting rules? Does it take locale into account? No, list.sort() is a generic sorting function. If you want to sort according to the Unicode …

I have the following list created from a sorted csv list1 = sorted(csv1, key=operator.itemgetter(1)) I would actually like to sort the list by two criteria: first by the value in field 1 and then ...