[toc] Problem Formulation: Let’s say we have a directory containing other subdirectories which further contain files. How do we search for a specific file in the subdirectories in our Python script? Scenario: We have a parent folder (Parent) with child folders (child_1, child_2, and child_3). There are files in the parent directory/folder as well as … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to convert a Dictionary into a NumPy array in Python. Example: Input Dictionary: {2017: 74, 2018: 80, 2019: 84, 2020: 73, 2021: 79} Output NumPy Array: [[2017 74] [2018 80] [2019 84] [2020 73] [2021 79]] To make it more fun, we have the … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to erase the contents of a flat text file in Python. Given the file name of a file with some content. You want to erase all content of the file to obtain an empty one like this: To make it more fun, we have … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to calculate percentages of a numbers list (float or integer) in Python. Given: A Python list of numerical elements (float or integer), and A percentage value. Apply the percentage value to each list element and print the result to the Python shell. 15% to … Read more
Do you know which data visualization tool is ideal for interrelation analysis? Is a bar chart a better choice for this? Certainly not. The Chord Diagram is the best visualization tool for interrelation analysis. This graphical tool depicts how one entity is linked to others quantitatively. We can glean valuable information from this diagram. This … Read more
Summary: os.path.basename(path) enables us to get the file name from the path, no matter what the os/path format. Another workaround is to use the ntpath module, which is equivalent to os.path. ✨Problem: How to extract the filename from a path, no matter what the operating system or path format is? For example, let’s suppose that … Read more
Summary: You can evaluate the execution time of your code by saving the timestamps using time.time() at the beginning and the end of your code. Then, you can find the difference between the start and the end timestamps that results in the total execution time. [toc] Problem: Given a Python program; how will you measure … Read more
Quick Fix: Python raises the ImportError: No module named pandas when it cannot find the Pandas installation. The most frequent source of this error is that you haven’t installed Pandas explicitly with pip install pandas. Alternatively, you may have different Python versions on your computer, and Pandas is not installed for the particular version you’re … Read more
With Exploratory Data Analysis (EDA) functions in Python, it is easy to get a quick overview of a dataset. The EDA’s goal is the statistical summary and graphical visualization of a dataset. This will help to discover patterns, missing values and help to extract further information for statistical modeling. The first step in the data … Read more
Problem Formulation Given a list in Python. How to check if the list has an even number of elements? Examples: [] –> True [1] –> False [1, 2] –> True [1, 2, 3] –> False Related Article: How to check if a list has an odd number of elements? Method 1: len() and Modulo The … Read more
Problem Formulation Given a list in Python. How to check if the list has an odd number of elements? Examples: [] –> False [1] –> True [1, 2] –> False [1, 2, 3] –> True Related Article: How to check if a list has an even number of elements? Method 1: len() and Modulo The … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to locate and return the common elements of two (2) lists in Python. To make it more fun, we have the following running scenario: Bondi Brokers offers two (2) Marketable Bonds: 3-years and 5-years. Each yields different amounts. To determine which Bond best suits … Read more