![]() Sorting a List of Tuplesīefore we dive in, let’s see how Python compares two tuples. In fact the key parameter is very powerful as it allows us to define our own custom sorting functions as we will see later. This is indeed very helpful because now we can pass the str.lower as the key parameter to the sort function.Īnd this will instruct the sort function to perform comparisons between the all-lowercase versions of the strings which is exactly what we want! > L = Īs you can see, now the sorting is case insensitive. This key parameter specifies a function that will be called on each list item before making comparisons. Starting with Python 2.4, both sort and sorted added an optional key parameter. So how can you sort a list of strings in a case insensitive manner? However, most of the time you want to treat strings as case insensitive when it comes to sorting. If that’s what you want then cool, go ahead and use it without any modifications. The reason for that is because Python treats all uppercase letters to be lower than lowercase letters. Let’s see what happens when there exists uppercase letters. Let’s look at another example, this time using sorted > L = ![]() Here is an example using sort: > L = Īnd you can still use the reverse parameter to sort in a descending order. So what if you want to sort a list of strings instead of numbers? Now let’s take a look at how to sort a list of strings. Here is another example to show how you can use the sort method in a descending manner. If you want to sort in a descending order, all you have to do is add the parameter reverse = True to either the sort or sorted functions. > L = Īs you can notice, both sort and sorted sort items in an ascending order by default. If you want to create a new sorted list without modifying the original one, you should use the sorted function instead. Notice that the list L was sorted in place. You can sort a list of numbers (integers or floats) very easily by using the sort method. Sorting a numerical list is a piece of cake in Python. Sorting a list of tuples by the second element.Sorting a list of strings in a case insensitive manner.Otherwise, feel free to jump straight to a specific section. Read the whole article if you want to learn all about list sorting in Python. I will also teach you how to define your own custom sort functions. In this article, I will teach you how to use these functions to sort, in an ascending or descending manner, a list of numbers, strings, tuples, or literally any object. The difference between sort and sorted is that sort is a list method that modifies the list in place whereas sorted is a built-in function that creates a new list without touching the original one. You have a python list and you want to sort the items it contains.īasically, you can either use sort or sorted to achieve what you want.
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