One of the main benefits of writing computer programs is to automate tasks based on inputs and conditions. Adding logic to code is possible through decision-making if…else statements. For example, a square root function should only compute the square root of an input if its value is positive. Otherwise, the function should warn about false …
R if…else Statement: A Step-by-Step Guide (with Examples) Read More »
In Python, you can introduce logic to your code with if-else statements. You can use if-else statements to build decision-making capabilities for your program. For example: When you run this piece of code, it tells whether or not you can drive based on your age. Because the age is 10, the program tells you cannot …
Python If-Else Statements — Conditional Logic [10+ Examples] Read More »
Python switch-case statements are here as of Python 3.10! These statements are actually called match-case statements. With a match-case statement, you can get rid of rather verbose if-elif-else chains like this: Instead, you can use a compact match-case expression to do the exact same: In some situations, the latter approach is better. It can make …
Python ‘switch case’ Statement: A Complete Guide (match case) Read More »
When you call a function with a yield keyword, the code in the function does not run. Instead, a generator object is created. You can store the generator object to a variable. This generator object has the ability to run the code inside the function on demand. When you invoke the generator object, Python runs …
Python ‘yield’ Keyword—What Does It Do? [with Examples] Read More »
A Python ternary operator makes it possible to write if-else statements as simple one-liner expressions. Here’s what the syntax of a ternary operator looks like in Python. This is a complete guide to using the ternary operator in Python. You will learn why and when you should or should not use it. The theory is …
Python Ternary Operator: A Complete Guide with Examples Read More »
Dealing with dates and times in Python programs is common. You might need to write programs that deal with dates, times, or both. Besides, you commonly want to format these dates differently, build them from strings, and calculate time differences. In Python, you can use the built-in datetime module for time and date manipulation. This …
Python datetime: A Comprehensive Guide (with Examples) Read More »
Loops are a common programming pattern in Python. With a loop, you can repeat code without manual effort. For example, you can use a loop to iterate through a list of names and sort them. Sometimes, you might need to place a loop inside another loop. This is called a nested loop in programming. Even …
To access a nested dictionary in Python, apply the access operator twice (or more). For example, let’s access the name of a student data dictionary with the student ID of 123: Output: This guide teaches you how to access nested dictionaries in Python. Besides, you learn how to create a nested dictionary, access the elements, …
Python How to Access Nested Dictionary (with 5+ Examples) Read More »
This guide teaches you how to fix the common error ValueError: setting array element with a sequence in Python/NumPy. This error occurs because you have elements of different dimensions in the array. For example, if you have an array of arrays and one of the arrays has 2 elements and the other has 3, you’re …
Numpy Fix “ValueError: setting an array element with a sequence” Read More »
In Python, you mainly deal with variables that are either: But when you have a function inside another function, the outer function’s variables are neither local nor global in the eyes of the inner function. These variables are called nonlocal variables in Python. If you need to work with a nonlocal variable in Python, you …
Python ‘nonlocal’ Keyword: A Complete Guide (Examples) Read More »
