In many Python regex functions, you see a third argument flags. What are they and how do they work? Flags allow you to control the regular expression engine. Because regular expressions are so powerful, they are a useful way of switching on and off certain features (e.g. whether to ignore capitalization when matching your regex). … Read more
In Python’s pandas module, DataFrames are two-dimensional data objects. You can think of them as tables with rows and columns that contain data. This article provides an overview of the most common ways to instantiate DataFrames. 💡 Note: We follow the convention to rename the pandas import to pd. Create a DataFrame From a CSV … Read more
Do you encounter this stupid error? You’re not alone—thousands of coders like you generate this error in thousands of projects every single month. This short tutorial will show you exactly why this error occurs, how to fix it, and how to never make the same mistake again. So, let’s get started! Python throws the TypeError … Read more
The most Pythonic way to convert a list of floats fs to a list of integers is to use the one-liner fs = [int(x) for x in fs]. It iterates over all elements in the list fs using list comprehension and converts each list element x to an integer value using the int(x) constructor. This … Read more
A recent study from O’Reilly found that data science is a wide field with many specializations and job descriptions. However, the average earning of an employed data scientist—45% of all respondents would consider themselves as such—is between $60,000 and $110,000. This means that experienced data scientists over time quite certainly reach six-figure income levels if … Read more
Two mega trends can be observed in the 21st century: (I) the proliferation of data—and (II) the reorganization of the biggest market in the world: the global labor market towards project-based freelancing work. By positioning yourself as a freelance data scientist, you’ll not only work in an exciting area with massive growth opportunities but you’ll … Read more
Ready, Steady, Go —-> Data Science by setting up Conda in your Computer It has never been easier from the early python data tools invention than now, to set up an user environment in our own computer. Conda brings that easiness with it. Conda as it defines itself is an “OS-agnostic, system-level binary package manager … Read more
Do you want to enrich your Python script with powerful text-generation capabilities? You’re in the right place! What does it do? I just discovered DeepAI’s API that automatically generates a body of text, given a sentence fragment or topic keyword. How can it be used? You can use this as a basis to generate text … Read more
This tutorial provides you a quick and dirty introduction to the most important Pandas features. A popular quickstart to the Pandas library is provided by the official “10 Minutes to Pandas” guide. This tutorial in front of you aims to cover the most important 80% of the official guide, but in 50% of the time. … Read more
Summary: The key goal of __str__ and __repr__ is to return a string representation of a Python object. The way they represent the string object differentiates them. str() & __str()__ return a printable/readable string representation of an object which is focused on the end-user. repr() & __repr()__ return a string representation of an object that is a valid Python object, something you can … Read more
Rapid Answer: The following one-liner calculates the MD5 from the string ‘hello world’: Background: MD5 message-digest is a vulnerable cryptographic algorithm to map a string to a 128-bit hash value. You can use it as a checksum on a given text to ensure that the message hasn’t been corrupted. However, you shouldn’t use it as … Read more
Prerequisites Python Fundamentals Numpy basics Learning Outcomes from tutorial How structured data can be formed Numpy Structured Array – Creation, Assigning data and doing operations Creating Structured Datatype (dtype) Memory allocation to Structured Arrays Record Arrays – How it’s related to the Structured Arrays Understanding the requirement of Pandas package Structured arrays are special forms … Read more