Python Dictionary

How To Format A String That Contains Curly Braces In Python?

Summary: Use one of the following methods to format strings that contain curly braces: Use double curly braces {{}} Use the old string formatting, i.e. the % operator Use the JSON Library Use Template Strings Problem: Given a string literal with curly braces; how to format the string and ensure that the curly braces are …

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56 Python One-Liners to Impress Your Friends

This is a running document in which I’ll answer all questions regarding the single line of Python code. It’s based on my interactive collection here but without the slow videos and embedded code shells. Let’s get started! Python One Line If Else You can use a simple if statement in a single line of code. …

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Python One Line Dictionary

Python’s dictionary data structure is one of the most powerful, most underutilized data structures in Python. Why? Because checking membership is more efficient for dictionaries than for lists, while accessing elements is easier for dictionaries than for sets. In this tutorial, you’ll learn how to perform four common dictionary operations in one line of Python …

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How to Solve Python “TypeError: ‘int’ object is not iterable”?

It’s quite common for your code to throw a typeerror, especially if you’re just starting out with Python. The reason for this is that the interpreter expects variables of certain types in certain places in the code. We’ll look at a specific example of such an error: “typeerror: ‘int’ object is not iterable”. Exercise: Run …

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Replacements For Switch Statement In Python?

Summary: Since switch-case statements are not a part of Python, you can use one of the following methods to create a switch-case construct in your code : Using a Python Dictionary Creating a Custom Switch Class Using if-elif-else Conditional Statements Using a Lambda Function Problem: Given a selection control switch case scenario in Python; how …

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How To Resolve UnboundLocalError On Local Variable When Reassigned After The First Use?

Summary: To resolve an UnboundLocalError when the local variable is reassigned after the first use, you can either use the global keyword or the nonlocal keyword. The global keyword allows you to modify the values of a global variable from within a function’s local scope while the nonlocal keyword provides similar functionality in case of …

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How To Create a Variable Number Of Variables?

To create a variable number of variables in Python, either use a dictionary or a namedtuple. Problem:  How can you store variable number of variables in your Python code?   Example: Consider that there is a requirement wherein you have to store the specifications of a product in a single variable which includes a variable …

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How to merge two Python dictionaries in a single expression in Python?

Summary: To merge two dictionaries dict1 and dict2 in a single expression, use the dictionary unpacking feature z = {**dict1, **dict2}. This creates a new dictionary and unpacks all (key-value) pairs into the new dictionary. Duplicate keys are automatically resolved by this method. Mastering dictionaries is one of the things that differentiates the expert coders …

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Python Dictionary – The Ultimate Guide

Python comes with several built-in data types. These are the foundational building blocks of the whole language. They have been optimised and perfected over many years. In this comprehensive tutorial, we will explore one of the most important: the dictionary (or dict for short). For your convenience, I’ve created a comprehensive 8000-word eBook which you …

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The World’s Most Concise Python Cheat Sheet

Do you want to learn Python but you’re overwhelmed and you don’t know where to start? Learn with Python cheat sheets! They compress the most important information in an easy-to-digest 1-page format. Here’s the new Python cheat sheet I just created—my goal was to make it the world’s most concise Python cheat sheet!

Python One Line X

This is a running document in which I’ll answer all questions regarding the single line of Python code. If you want to become a one-liner wizard, check out my book “Python One-Liners”! 🙂 This document contains many interactive code shells and videos to help you with your understanding. However, it’s pretty slow because of all …

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