How to Sort a List of Objects in Descending Order by Attribute?

How to Sort a List of Objects Based on an Attribute of the Objects

Sorting lists of complex objects, such as Python objects, can be a common programming task. Consider the following scenario:

Problem:

Given a list of Python objects with specific attributes, how do you sort it based on a specific attribute in descending order?

Solution:

To sort a list of objects based on an attribute, such as .count, use the sort method with a lambda function as the key and set reverse to True for descending order.

Code:

To sort the list in place, use:

orig_list.sort(key=lambda x: x.count, reverse=True)

To return a new sorted list, use:

new_list = sorted(orig_list, key=lambda x: x.count, reverse=True)

Explanation:

• key=lambda x: x.count specifies the attribute, .count, as the sorting criterion.
• reverse=True sorts the list in descending order.

Additional Information:

• The .sort method sorts the list in place, while sorted returns a new sorted list.
• Lambda functions are anonymous functions that can be used as key arguments in sorting functions.
• Refer to the documentation for more details on sorting by keys.

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