Artturi Jalli

To filter a list in Python, use the built-in filter() function. For example, let’s filter a list of ages such that only the ages of 18+ are left: Output: Today you are going to learn three ways to filter a list in Python. We start from a basic for loop approach. Then we use a […]

To find the index of a list element in Python, use the built-in index() method. For example, let’s find the first string that equals “Bob” in a list of strings: To find the index of a character in a string, use the index() method on the string. For example, let’s find the first occurrence of

In Python, an else if block is called elif. For instance: Let’s take a deeper look at if…elif…else statements in Python. Python If-Elif-Else Statements In Python, if statements are used to check conditions. You can take specific actions based on the outcome. In Python, use the if…elif…else structure to check if conditions hold. Let’s start

Python string comparison is possible using the comparison operators: ==, !=, <, >, <=, >=. For example: String Comparison in Python Python comes with a list of built-in comparison methods: ==, !=, <, >, <=, >=. You commonly see comparisons made between numeric types in Python. But you can compare strings just as well. As

Counting in Python happens commonly via the count() method. For example, let’s count how many times the word “test” appears in a list: Output: To check how many times a letter occurs in a string, use the count() method of a string. For example: Output: These are two common examples. In this guide, we are

To create a list of strings in Python, add comma-separated strings in between square brackets. For example, here is a list of strings that represent names: Now that you have a list of strings, there are lots of things you might want to do with it. In the following, you are going to learn 10+

To write to CSV in Python, use Python’s csv module. For example, let’s write a list of strings into a new CSV file: As a result, you see a file called example.csv in the current folder. This was the quick answer. But there is a lot more to cover when it comes to writing CSV

To calculate a Python list length, use the built-in len() function. For example, let’s calculate the length of a list of integers: Output: Using the len() Function in Python Python comes with a built-in len() function. This is the most common way to calculate the length of a list. Actually, you are not restricted to

To convert a Python list into a string, use the join() method of a string: Output: This is a complete guide to converting a list to a string in Python. This guide shows you different approaches to making the conversion. Besides, you learn what to do if the list doesn’t have strings, to begin with.

To raise a number to a power in Python, use the Python exponent ** operator. For example, 23 is calculated by: And generally n to the power of m by: Python exponent is also related to another similar topic. The exponent notation is a way to express big or small numbers with loads of zeros.