Summary: The most straightforward way to remove an element at a given index from a NumPy array is to call the function np.delete(array, index) that returns a new array with the element removed. Problem: Given a Numpy Array; how to remove specific elements from the Numpy array? Example: Consider the following Numpy array as shown below: Challenge: How will you … Read more
What You Need to Know Before You Begin I was trading forex bots long before I started learning Python. When I look back on the experience, I wish I had done it in reverse. There are three basic reasons: Learning to code with Python is easier. I know it’s hard to believe, but it’s true. … Read more
Problem Formulation Problem: Given a Pandas DataFrame; how to change the strings in the DataFrame to lowercase? Example: Consider the following Pandas DataFrame: Output: Expected Output: When you change a pandas DataFrame string column to lowercase, then the column is returned such that every string in the column is converted and displayed in lowercase while any non-alphabetical … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to find the 2nd largest List element in Python. To make it more fun, we have the following running scenario: Rivers Clothing is currently reviewing its projected earnings for the next six (6) months. As their IT Specialist, you saved this data in a … Read more
Summary: You can convert a string to binary in Python using: bytearray() + bin() map() + bin() + bytearray() join() + format() + bytearray() join() + format() + ord() binascii.hexlify() Problem: How to convert a given string to its binary equivalent in Python? Example: When you convert a string to binary, it either results in … Read more
💬 Question: Which method finds the list of all occurrences of the pattern in the given string? Problem Formulation Problem Formulation: Given a longer string and a shorter string. How to find all occurrences of the shorter string in the longer one? Consider the following example: Longer string: ‘Finxters learn Python with Finxter’ Shorter string … Read more
In this article, you’ll learn about the following topics: List unpacking in Python Tuple unpacking in Python String unpacking in Python ValueError: too many values to unpack (expected k) ValueError: not enough values to unpack (expected x, got y) Unpacking nested list or tuple Unpacking underscore Unpacking asterisk Sequence Unpacking Basics Python allows you to … Read more
Syntax and Usage Specify a specific package by name to uninstall single package Path to requirements file which uninstalls all packages listed therein. Available Options and Command-Line Switches Used in place of [options] as seen in the above syntax. Flag Explanation -y–yes Suppresses confirmation for uninstall. -r <file>–requirement <file> Path to requirements … Read more
What is a Transposition Algorithm? A substitution algorithm, such as previously mentioned Caesar’s algorithm, works by substituting each symbol of the plaintext message with another symbol, according to a predetermined offset defined by a key. In contrast, a transposition algorithm shifts, or changes the positions of its symbols by following a specific, predetermined key. Since … Read more
The z-scores can be used to compare data with different measurements and for normalization of data for machine learning algorithms and comparisons. 💡 Note: There are different methods to calculate the z-score. The quickest and easiest one is: scipy.stats.zscore(). What is the z-score? The z-score is used for normalization or standardization to make differently scaled … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to read a text file from a URL in Python. To make it more fun, we have the following running scenario: Let’s assume you are a student and have been asked to write an essay on the Northern Lights. The data you require is … Read more
Problem Formulation and Solution Overview In this article, you’ll learn how to check if a variable is an integer data type in Python. During your career as a Pythonista, you will encounter many times where you need to test if a variable is an integer or not. 💬 Question: How would we write Python code … Read more