I'm trying to sort the rows of one array by the values of another. For example. I want to sort arr1 in descending order, and to have the current relationship between arr1 and arr2 to be maintained (ie, after sorting both, the rows of arr1 [0] and arr2 [0, :] are the same). Other than doing list comprehensions of reversed list comprehension, is there a pythonic way to sort Counter by value? If so, it is faster than this: from collections import Counter &. How to sort file names in a particular order using python Ask Question Asked 10 years, 5 months ago Modified 4 years, 11 months ago Estou tentando por os números de uma lista em ordem crescente mas o método sort() está pondo o 10 e seus múltiplos (20, 30) como sendo semelhante a ele mesmo dividido por 10. Por exemplo, no código a JSON arrays are parsed to Python list s and JSON objects to Python dict s. dict s are unordered in Python. You would need some ordered container. Try to store the data in an OrderedDict: from collections import OrderedDict Here's an approach that creates no intermediate Python lists, though it does require a NumPy record array to use for the sorting. If your two input arrays are actually related (like columns in a spreadsheet) then this might open up an advantageous way of dealing with your data in general, rather than keeping two distinct arrays around all the time, in which case you'd already have a record. Por que a função sorted() é considerada mais direta do que o método.sort() usado em listas com tuplas? In Python 3, you can use the most_common function of collections.Counter. This uses the most_common function available in collections.Counter, which allows you to find the keys and counts of n most common keys. The python style guide suggests to group imports like this: Imports should be grouped in the following order: standard library imports related third party imports local application/li. The key argument to sort specifies a function of one argument that is used to extract a comparison key from each list element. So we can create a simple lambda that returns the last element from each row to be used in the sort. A lambda is a simple anonymous function. It's handy when you want to create a simple single use function like this.