Problem Formulation and Solution Overview If you print dictionary keys using print(dict.keys()), Python returns a dict_keys object, i.e., a view of the dictionary keys. The representation prints the keys enclosed in a weird dict_keys(…) wrapper text, e.g., dict_keys([1, 2, 3]). Here’s an example: There are multiple ways to change the string representation of the keys, … Read more
Problem Formulation and Solution Overview If you print all values from a dictionary in Python using print(dict.values()), Python returns a dict_values object, a view of the dictionary values. The representation prints the values enclosed in a weird dict_values(…) wrapper text, for example: dict_values([1, 2, 3]). Here’s an example: There are multiple ways to change the … Read more
The most Pythonic way to print a dictionary except for one or multiple keys is to filter it using dictionary comprehension and pass the filtered dictionary into the print() function. There are multiple ways to accomplish this and I’ll show you the best ones in this tutorial. Let’s get started! 🚀 👉 Recommended Tutorial: How … Read more
To print a list without its first and last elements, you can pass the result of slicing my_list[1:-1] into the print() function. This slices from the second element (included) to the last element (excluded) with negative index -1 that reads like “the first sequence element from the right”. Note that the stop index in the … Read more
To print a list without its last element, you can pass the result of slicing my_list[:-1] into the print() function. This slices from the first element (included) to the last element (excluded) with negative index -1 that reads like “the first sequence element from the right”. Note that the stop index in the slicing notation … Read more
To print a list without its first element, you can pass the result of slicing expression my_list[1:] into the print() function. This slices from the second list element to the last one. Note that the start index in the slicing notation [start:stop] is included in the output of the slicing operation. If the stop index … Read more
Problem Formulation Given a Python list of elements. If you print the list to the shell using print([1, 2, 3]), the output is enclosed in square brackets and separated by commas like so: [1, 2, 3] But you want the list without commas like so: [1 2 3] How to print the list without separating … Read more
💬 Question: Given a Boolean value True or False. How to convert it to a string “True” or “False” in Python? Note that this tutorial doesn’t concern “concatenating a Boolean to a string”. If you want to do this, check out our in-depth article on the Finxter blog. Simple Bool to String Conversion To convert … Read more
Easy Solution Use the addition + operator and the built-in str() function to concatenate a boolean to a string in Python. For example, the expression ‘Be ‘ + str(True) yields ‘Be True’. The built-in str(boolean) function call converts the boolean to a string. The string concatenation + operator creates a new string by appending the … Read more
This article will show you how to retrieve a single generator element in Python. Before moving forward, let’s review what a generator does. Quick Recap Generators 💡 Definition Generator: A generator is commonly used when processing vast amounts of data. This function uses minimal memory and produces results in less time than a standard function. … Read more
⚔️ Programming Challenge: Given an integer n that could be very high (e.g., n=1000000). How to initialize a Python dictionary of size n that is fast, easy, and efficient? Next, you’ll learn the five main ways to solve this and compare their performance at the end of this article. Interestingly, the winner Method 4 is … Read more
Problem Formulation 💬 Programming Challenge: Given a dictionary where the values are lists of varying sizes. Find and return the shortest list! Here’s an example: Also, you’ll learn how to solve a variant of this challenge. 💬 Bonus challenge: Find only the key that is associated with the shortest list in the dictionary. Here’s an … Read more