In Solidity, you can use the require, revert, and assert functions to check error conditions and handle exceptions, but they look similar at first glance, and you might get confused about how to use them. This article will explain their differences, specifically to Python developers. We use a simple smart contract below, taken from the … Read more
What is a Graph? When we want to illustrate how one thing relates to another, most often, we would preferably use a graph. From a concrete perspective, a graph is a graphical representation or an image of relationships. A graph is built of entities and their relationships. Entities represent actors in a relationship you are … Read more
In the time of web scraping or with the purpose of automation, we require to get the text from the HTML element of the page. Selenium allows us to do this with a special “.text()” method. This method helps us bringing out the text that is visible in the HTML content. Today we will dive … Read more
What is to be done when you are stuck somewhere in the time of executing your automation script or you do not find a way out to reload the page that is required now? Selenium comes up with some amazing technologies that help you to solve these sorts of problems easily. Selenium has some very … Read more
The data we use in Pandas for real-world projects often comes from outside sources. One popular and repeatedly used source is Excel. In this tutorial, we will learn how to read files from Excel, how to modify these files, and how to write them to Excel. We will use several Pandas functions for these approaches. … Read more
To provide a solid understanding of data manipulation with Excel, the Finxter Academy has created a 6-part series to take the user from beginner to advanced. This article assumes that Microsoft Excel is available on the computer. Quick Intro In most cases, working with large amounts of data requires some manipulation to make it more … Read more
This tutorial is about applying object segmentation in five lines of code. We show a beginner-friendly code implementation using the PixelLib library on Google Colab. Does machine learning have to be hard? Well, back then when everything must be coded from scratch, yes. But today, we are stepping on the shoulders of giants. Lots of … Read more
Syntax object.__rmatmul__(self, other) The Python __rmatmul__() method implements the reverse matrix multiplication @ operation with reflected, swapped operands. So, when you call x @ y, Python attempts to call x.__matmul__(y). If the method is not implemented, Python attempts to call __rmatmul__ on the right operand and if this isn’t implemented either, it raises a TypeError. … Read more
Syntax object.__rand__(self, other) The Python __rand__() method implements the reverse Bitwise AND * operation with reflected, swapped operands. So, when you call x * y, Python attempts to call x.__and__(y). If the method is not implemented, Python attempts to call __rand__ on the right operand and if this isn’t implemented either, it raises a TypeError. … Read more
Syntax object.__rmul__(self, other) The Python __rmul__() method implements the reverse multiplication operation that is multiplication with reflected, swapped operands. So, when you call x * y, Python attempts to call x.__mul__(y). Only if the method is not implemented on the left operand, Python attempts to call __rmul__ on the right operand and if this isn’t … Read more
Syntax object.__rsub__(self, other) The Python __rsub__() method implements the reverse subtraction operation that is subtraction with reflected, swapped operands. So, when you call x – y, Python attempts to call x.__sub__(y). Only if the method is not implemented on the left operand, Python attempts to call __rsub__ on the right operand and if this isn’t … Read more
A Python nested dictionary is a dictionary with another dictionary or dictionaries nested within (dictionary of dictionaries or collection of collections). Nested dictionaries are one way to represent structured data (similar to a database table(s) relationship). An analogy for this concept is the Russian Nesting Dolls. Our article focuses on various ways to retrieve … Read more