This article explains the concept of gas in Ethereum and the basics you need to know when developing smart contracts in Solidity. What is Gas in Ethereum? In Ethereum, we have to pay for each computational operation, measured in the unit called gas. In the Ethereum documentation, gas is defined as follows: “Gas refers to … Read more
Problem Statement: How to fix the Python error – “Import error: No module named urllib2” ? A Gentle Introduction URL stands for Uniform Resource Locator. Basically, URL is used to identify a resource on the internet. In order to fetch an URL from the internet and use the data within the URL, the urllib2 standard … Read more
Did you get the “‘geckodriver’ executable needs to be in PATH?” error message when running your Python program? Are you searching for the answers in Q& A programming websites? But are you confused about the solutions provided on their websites? Are their solutions not working to rectify the issues? If your answer is YES. You … Read more
[toc] Reason Behind: ‘dict’ object has no attribute ‘iteritems’ Many changes are done from Python 2 to Python 3. One such change is in the attributes of the dictionary class. The dict attribute, i.e., dict.iteritems() has been removed and a new method has been added to achieve the same result. First, let us try to … Read more
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
[toc] Introduction In general, encoding means using a specific code for the letters, symbols, and numbers. Numerous encoding standards that are used for encoding a Unicode character. The most common ones are utf-8, utf-16, ISO-8859-1, latin, etc. For example, the character $ corresponds to U+0024 in utf-8 standard and the same corresponds to U+0024 in … Read more
Today, when trying to get some information about specific pip packages, I wanted to use the pip search command in my local computer’s PowerShell. pip search Here’s the syntax: py -m pip search [options] <query> The semantics of pip search is to find PyPI packages that contain the <query> in their package name. Error Message … Read more
[toc] Generally, logging is an extremely valuable tool in a software developer’s toolbox. Logging helps to assist you with the flow of a program and find situations that you probably would not have considered while coding. By logging useful data and information, you can troubleshoot the errors effectively as well as utilize the information to … Read more
Pytest is a popular test framework in Python. It helps to automate the test execution process and run unit tests as frequently as possible with minimal effort. Everyone who has at least some experience with computer programming would intuitively know that testing is critical when building a software application. But beginners often find it difficult … Read more
Problem Formulation You create a namedtuple object in your code and you want to overwrite one of the attribute values like you’re used to for normal objects: But, unexpectedly, Python raises an AttributeError: can’t set attribute. ? What can you do? ? Let’s understand the reason this error occurs—after that, you’ll learn the best fixes. … Read more
Problem Formulation Given a basic Python program. How to print an exception if it occurs without exiting the program? For example, consider the following program that raises a ZeroDivisionError: division by zero. The output is: You want the program to keep running and executing the print statement after giving you a note about the exception: … Read more
From teaching hundreds of thousands of students Python, I found this error to be a classic. I think understanding classes is hard enough, but many coders who’ve just started to learn about Python are rightly confused ? about the TypeError that complains about too few positional arguments. Let’s resolve this confusion once and for all, … Read more