Hey Finxters! Today, you’ll learn an important function that you may need to write in the future: how to write a Python program to calculate the angle between 2 points in a clockwise motion. We will be using principles in the Python language to write a working program to write the angles and calculate the … Read more
Python’s built-in list() function creates and returns a new list object. When used without an argument, it returns an empty list. When used with the optional iterable argument, it initializes the new list with the elements in the iterable. Read more about lists in our full tutorial about Python Lists. Usage Learn by example! Here … Read more
Numpy is a popular Python library for data science focusing on linear algebra. In this article, you’ll learn how to initialize your NumPy array. How to Initialize a NumPy Array with Zeros? To initialize your NumPy array with zeros, use the function np.zeros(shape) where shape is a tuple that defines the shape of your desired … Read more
This article explains how to insert a cursor to your plot, how to customize it and how to store the values that you selected on the plot window. In lots of situations we may want to select and store the coordinates of specific points in our graph; is it just for assessing their value or … Read more
Challenge: Given a Python program that writes data into a file. If you run the program again, it’ll overwrite the file written by the first execution of the program. Each time you run this program, the original content in file.dat will be overwritten. How to avoid this overwriting by adding an integer suffix to the … Read more
NumPy is a popular Python library for data science. The focus of the library is computations on arrays, vectors, and matrices. If you work with data, there is no way that you can avoid NumPy. In this tutorial, you’ll learn more about the shape of a NumPy array. In particular, you’re going to learn the … Read more
Recap: Python’s map() function takes a function and an iterable—such as a list—as arguments. It then applies the function to each element in the iterable. It returns a map object. ? But what if you don’t need a map object but a list? Old: In Python 2.x this was easy: the map() function simply returned … Read more
Numpy is a popular Python library for data science focusing on arrays, vectors, and matrices. If you work with data, you simply cannot avoid NumPy. Challenge: How to get the number of dimensions of a NumPy array? Solution: Use the attribute array.ndim to access the number of dimensions of a NumPy array. Note that this … Read more
Challenge: Given a string ‘/path/to/file.py’. How to check whether a file exists at ‘/path/to/file.py’, without using the try and except statements for exception handling? # What You Want! if exists(‘/path/to/file.py’): … # Do something Solution: To check whether a file exists at a given path, Run from pathlib import Path to import the path object, … Read more
Hey Finxters! It is time for another Top 10 Cheat Sheets for all of the developers out there to have saved to a folder or taped to the wall. No matter how you collect these cheat sheets, keep them on hand for reference. Today we will be taking a look at the Command Line using … Read more
Probability and Statistics play a very important role in the field of data science and machine learning. In this blog post you will learn the concept of proportional sampling and how can we implement it from scratch without using any library Proportional Sampling Let us take an example of tossing a die to better understand … Read more
A set is an unordered collection of elements. Each element can exist at most once in a set. There are no duplicate elements. Goal: How to intersect to Python sets? Solution: set_a & set_b The set intersection operator set_a & set_b intersects two sets, i.e., creates a new set with elements that exist in both … Read more