Problem Formulation 💬 Question: How do you write a function that returns a real Python error instead of an “error code” such as -1 or None in case something got wrong? For example, you may want to check the function input arguments for having the correct type or length (in the case of iterable arguments) … Read more
💬 Question: How can I return a Matplotlib axis, plot, or figure object in Python so I can set some defaults and plot a figure quickly based on those defaults? Basic Solution To return a Matplotlib object from a function, follow these steps: 👇 Create a function my_plot(x, y, …) with arguments to customize your … Read more
This quick tutorial will show you how to return a value from a nested function. I assume you have your reasons for doing so. However, a word of warning: ⚡ Attention: The main reason you want to create “nested functions”, i.e., inner and outer functions in Python, is to use them for closures and decorators. … Read more
Do you need to create a function that returns an integer value but you don’t know how? No worries, in sixty seconds, you’ll know! Go! 🔥🔥🔥 A Python function can return any object. To return an integer, use the built-in int() function. Or create your own function with an arbitrary expression within the function body … Read more
💬 Question: How to return one or multiple arguments from a Python function? Basically, creating a function that reflects one or more arguments like a mirror: Let’s find out! 👇 Method 1: Return Single Argument A function can return a single argument by passing that argument variable after the return keyword. If the argument name … Read more
Do you need to create a function that returns a float but you don’t know how? No worries, in sixty seconds, you’ll know! Go! 🔥🔥🔥 A Python function can return any object such as a float value such as 3.14. To return a float, you can use the built-in float() function or create your own … Read more
💬 Question: What is the difference between return and break? When to use which? Let’s first look at a short answer before we dive into a simple example to understand the differences and similarities between return and break. Comparison Both return and break are keywords in Python. The keyword return ends a function and passes … Read more
💬 Question: How to return a global variable from a Python function. And how to return a local variable? First, have a look at the overview figure that shows how to return a local and global variable from a Python function using a simple example: Let’s dive into this example in more detail and answer … Read more
Do you need to create a function that returns a file but you don’t know how? No worries, in sixty seconds, you’ll know! Go! 👇 A Python function can return any object such as a file object. To return a file, first open the file object within the function body, handle all possible errors if … Read more
Problem Formulation Say, you have a function create_df() that creates a DataFrame from some data that may be read from a CSV file, the web, or from another variable in the code (e.g., a nested list)—doesn’t matter. You want to return the DataFrame to the caller of the function at runtime. ⚡ However, the code … Read more
Do you need to create a function that returns a NumPy array but you don’t know how? No worries, in sixty seconds, you’ll know! Go! 🚀 A Python function can return any object such as a NumPy Array. To return an array, first create the array object within the function body, assign it to a … Read more
Method 1: Return a New Empty List Using Square Brackets You can return an empty new list from a Python function using the square bracket notation [] after the return keyword using the expression return []. Here’s an example: The example also shows that the two created empty lists using two function calls point to … Read more