def reverse_enum(L): for index in reversed(xrange(len(L))): yield index, L[index] L = ['foo', 'bar', 'bas'] for index, item in reverse_enum(L): print index, item #3 L = ['foo', 'bar', 'bas'] for index in reversed(range(len(L))): print index, L[index]
reverse flag can be set to request the resultindescending order >>>help(list.sort) Help on method_descriptor: sort(...) L.sort(key=None, reverse=False) -> None -- stable sort *IN PLACE* list.sort() 会把原始列表修改,return None ,当你不需要原始列表的时候,这个方法会更有效率。 >>> ...
To sort a list of strings in Python you can use the sort() method. This method will order the list of strings in place, meaning that it will modify the
Thereversed()function in Python is an iterator that yields elements in reverse order without modifying the original list. Because it creates an iterator rather than a new list,reversed()is memory-efficient, making it a good choice when working with large datasets. ...
In this quiz, you'll test your understanding of sorting in Python using sorted() and .sort(). You'll revisit how to sort various types of data in different data structures, customize the order, and work with two different ways of sorting in Python.Ordering...
The negative sign is used to sort the scores in descending order. Problem 4: Sorting a List of Custom Objects When working with custom objects, you can use lambda functions to define custom sorting criteria for those objects. class Student: def __init__(self, name, age): self.name = ...
1. Reverse To sort the objects in descending order, you need to use the "reverse" parameter and set it to "True": Python list reverse example a = [1, 2, 3, 4] a.sort(reverse=True) print(a) # [4, 3, 2, 1] 2. Key If you need your sorting implementation, the sort met...
Sort a List of Strings in Python in Descending OrderAt this point, we’re able to sort properly, but let’s take things a step further. Let’s sort the list backwards. In other words, the word that normally comes last alphabetically will come first:my_list = ["leaf", "cherry", "...
Here, the sublists are sorted based on their second element (index1) in descending order. Sort a List of Lists in Python Using thelambdaExpression Along With thesorted()Function In addition to the combination ofitemgetter()from theoperatormodule andsorted(), Python offers an alternative method ...
Similarly, to sort a list of tuples in descending order, you can use thesorted()function with thereverseparameter set toTrue. # Using sorted() function tuples = [(2500, 'Hadoop'), (2200, 'Spark'), (3000, 'Python')] print("Orginal: ",tuples) ...