![]() ![]() It is almost the same as the above example, but more prolonged and more repetitive. Let’s take a look at an example: # empty list & non-empty list Therefore, it is just a long and repetitive implementation of what we did before. bool() evaluates a data type into its boolean value. The bool() function can also be used to check if a list is empty in a similar fashion we did previously. That has also been done to non_empty_list, which evaluates to a True because it is not an empty list. Therefore triggering the else block to run. The first list, empty_list, is an empty Python list When we pass it to the function, it gets evaluated and because it is empty it will produce a False value. Then using boolean evaluation, it evaluates that list to either True or False. The function takes in a list as its argument. What we did in the above example was create a function check_list_empty that checks if a list is empty or not. # empty list & non-empty listĬheck_list_empty(non_empty_list) The list is empty Let’s take a look at one example to check if a list is empty in Python using boolean evaluation. An empty list will evaluate as False, and a list that is not empty will evaluate as the opposite – True. evaluate into a boolean value – either True or False – depending on whether the list is empty or not empty. The concept behind this method is that simple datatypes like tuples, lists, strings, etc. It is the method recommended in the PEP 8 style guide You can read more about this under Programming Recommendations. ![]() Using Boolean Evaluation is the recommended way to check if a list is empty in Python. Check if list is empty in Python Using Boolean Evaluation Conclusion: 3 Ways to Check if List is Empty Python.ġ.Is an empty Python list equal to False?.How to check if a list is not empty python.What is the best way to check if a Python list is empty?.FAQs on 3 Ways to Check if List is Empty Python.3. Check if list is empty in Python by comparing it with an empty list.Check if list is empty in Python Using the len() method 1. Check if list is empty in Python Using Boolean Evaluation.I have arranged this list of methods in the order of their favorability – starting with the most pythonic and ending with the least I’ll always recommend you use the recommended one – which we will look at in the next section – unless your problem requires a different solution. I have included them all so that you will have a broader understanding of working with lists and a wider range of options to choose from for whatever problem you are solving. Some methods of checking the emptiness of a list are not favorable, while others are even recommended by Pep 8. Whatever reason you may want to check if a list is empty in Python, you will find the 3 methods to do so outlined in this post very useful. ![]() This among other things is the common usage of checking if a list is empty in Python. But before you do so, it is also quite useful to start by checking if the list you want to iterate – using a for loop or any other loop – is empty. Iterating over lists or any other collections of data, such as dictionaries, or tuples, is a common coding task. ![]()
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