💬 Question: Say you have an expression you want to execute using the exec() function. How to store the result of the expression in a Python variable my_result? Before I show you the solution, let’s quickly recap the exec() function: Recap Python exec() Python’s exec() function executes the Python code you pass as a string … Read more
Problem Formulation: Given a float number. How to round the float down in Python? Here are some examples of what you want to accomplish: 42.52 –> 42 21.99999 –> 22 -0.1 –> -1 -2 –> -2 Solution: If you have little time, here’s the most straightforward answer: To round a positive or negative number x … Read more
Problem Formulation: Given a float number. How to round the float up in Python? Here are some examples of what you want to accomplish: 42.42 –> 43 21.00001 –> 22 -0.1 –> 0 Solution: If you have little time, here’s the most straightforward answer: To round a number up in Python, import the math library … Read more
I have spent my morning hours on an important mission. What is the cleanest, fastest, and most concise answer to the following question: How do you find the key with the minimum value in a Python dictionary? Most answers on the web say you need to use a library but this is not true! To … Read more
Problem Formulation and Solution Overview As a Pythonista, coding issues may occur where you need to apply a function against NumPy elements. To make it more fun, we have the following running scenario: We have a NumPy array containing five (5) negative numbers related to an inconsistent inventory count. Therefore, the Vice-President of Rivers Clothing … Read more
Problem Formulation and Solution Overview As a Pythonista, coding issues may occur where you need to apply a function against array/matrix elements. To make it more fun, we have the following running scenario: The organization Happy Mortgages has six (6) different Mortgage Terms available: 30-Year, 20-Year, 15-Year, 10-Year, 7-Year, and 5-Year terms. The US Federal … Read more
Planteamiento del problema Dada una cadena en forma hexadecimal: Cómo convertir una cadena hexadecimal en un entero en Python Por ejemplo, quieres convertir la cadena hexadecimal ‘0xff’ en el entero decimal 255. Aquí hay otros ejemplos: 0x0 –> 0 0x4 –> 4 0x8 –> 8 0x12 –> 18 0x16 –> 22 0x20 –> 32 0x24 … Read more
This article focuses on analyzing the coronavirus dataset using Python language. We are not using any of the Python data analysis libraries. Instead, we’ll use our raw Python skills to write a function, slicing, and indexing. Also, we’ll use Python arithmetic operators such as sum() and division. Finally, we’ll use a lambda expression to perform … Read more
This article shows you how to apply a given function to each element of a Python dictionary. The most Pythonic way to apply a function to each element of a Python dict is combining the dictionary comprehension feature and the dict.items() method like so: {k:f(v) for k,v in dict.items()} Note: All the solutions provided below … Read more
This article shows you how to apply a given function to each element of a tuple. The best way to apply a function to each element of a tuple is the Python built-in map(function, iterable) function that takes a function and an iterable as arguments and applies the function to each iterable element. An alternate … Read more
Syntax object.__format__(self, spec) The Python __format__() method implements the built-in format() function as well as the string.format() method. So, when you call format(x, spec) or string.format(spec), Python attempts to call x.__format__(spec). The return value is a string. We call this a “Dunder Method” for “Double Underscore Method” (also called “magic method”). To get a list … Read more
Python’s magic method obj.__set_name__(self, owner, name) method is created on an attribute obj when the class owner holding the attribute is created. We call this a “Dunder Method” for “Double Underscore Method” (also called “magic method”). To get a list of all dunder methods with explanation, check out our dunder cheat sheet article on this … Read more