Mar 5, 2009 · I have a dictionary of values read from two fields in a database: a string field and a numeric field. The string field is unique, so that is the key of the dictionary. I can sort on the …

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 …

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

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 …

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 ...

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 …

I have some data either in a list of lists or a list of tuples, like this: data = [[1,2,3], [4,5,6], [7,8,9]] data = [(1,2,3), (4,5,6), (7,8,9)] And I want to sort by the 2nd element in the subset.

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 …

2 Sort using a key Since pandas 1.1.0, we can pass a key= parameter which admits a function as a sorting key much like the key argument in the builtin sorted() function in Python. However, …

The parameter passed to key must be something that is callable. The use of lambda creates an anonymous function (which is callable). In the case of sorted the callable only takes one …