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.

To print the contents of a list in Python, all you need to do is call the print() function on it. Here is an example of printing a list of three fruits in a list: Output: But if you want to print each element of a list separately, you should use a for loop. For

Converting string to int in Python is easy using the built-in int() function. For example, let’s convert the string “100” to an integer: How to Convert Comma-Separated Number String to Int? To convert a comma-separated number string (e.g. 1,000,000) to an int in Python, first, get rid of the commas with the replace() method. Then

To round numbers in Python, use the built-in round() function. For example, let’s round a floating-point number to its nearest integer value: Output: To round up or down, use the math module’s ceil() or floor() functions: In this guide, you will learn how to: Round a decimal number to a certain number of decimals. Round

Python string with %s is an old string formatting technique. The %s is placed into a string and it acts as a placeholder for another string variable. For example: Output: However, as more modern string formatting techniques have been added to Python, you rarely see this in use. And you should not use it either!

To write a module in Python, all you need to do is create a Python file and write some code to it. For example, to create a module called example, create a file called example.py and add the following function to it: There is your first Python module. To use it, you need to import

In Python, a mutable object can be changed, but an immutable object cannot. For example, a tuple is an immutable data type. You cannot change its elements after creating it: In contrast, a list is a mutable collection. You can change its contents afterward: This is a comprehensive guide to understanding the concepts of mutable