Have you stumbled upon the strange-looking Python operator A |= B in a code snippet and you don’t know what it means? This article will clarify it once and for all! Let’s start with the short answer: Python’s A |= B applies the | operator in place. Thus, it is semantically identical to the longer-form … Read more
Bitcoin capital expenditure and energy overhead are often criticized to be unsustainably high. But are they worth it in relation to the value provided by the Bitcoin network? TLDR; Capex and energy costs are estimated using the USD value of the transaction fees paid by the Bitcoin traders. The value of the Bitcoin monetary system … Read more
Problem Formulation Given a single Bitcoin address in the form of a stream of characters such as the address of the first “Genesis” block ever created on the Bitcoin blockchain: 12c6DSiU4Rq3P4ZxziKxzrL5LmMBrzjrJX How to get all transactions for this BTC address in a Python script? Solution To get all transactions of a given Bitcoin address, import … Read more
Problem Formulation Say, you have a given URL stored as a string in your Python script. You know that if you’d call get url, the server returns a JSON object. How to get the JSON object from a given URL in Python? Solution with urllib and json Modules You can get the JSON object from … Read more
Problem Formulation Say, you want to get the current price of a cryptocurrency using Python’s inofficial binance API. How do you do this for a precise point in time? Step 1: Install Python Binance with pip If you haven’t already, install the Python Binance API using the pip package manager. Run pip install python-binance in … Read more
Problem Formulation Given a function object assigned to a name. How to get the name of the function as a string? For example, consider the following function your_function. How to get the name “your_function” from this? Your desired value of the result stored in string_name is the string “your_function”. Method 1: Use the __name__ Attribute … Read more
Summary: The best way to plot a Confusion Matrix with labels, is to use the ConfusionMatrixDisplay object from the sklearn.metrics module. Another simple and elegant way is to use the seaborn.heatmap() function. Note: All the solutions provided below have been verified using Python 3.9.0b5. Problem Formulation Imagine the following lists of Actual and Predicted values … Read more
To convert a string to a lowercase string in Python, use the string.lower() built-in string method. This returns a lowercase string version. As you read over the explanations below, feel free to watch our video guide about this particular string method: If you want to perform case insensitive matching in languages such as German or … Read more
Problem Formulation Given a list and an element. How to insert the element at the last position of the list? Two Solutions There are two main ways to insert an element at the end of a given list. Use list.append(element) to add the element to the end of the list. This is the most idiomatic … Read more
Article Overview: In a previous post, we discussed the datetime module in Python and used it to iterate through a range of dates. Today, let’s learn how to manage timezones in Python using the datetime module and a third-party package called dateutil. I aim to choose a range of world cities and print the local … Read more
There are two ways to convert a Tensor to a NumPy array: TensorFlow version 2.x — use tensor.numpy() TensorFlow version 1.x — use tensor.eval(session=tf.compat.v1.Session()) Let’s dive into these two methods in greater detail. Method 1: Explicit Tensor to NumPy Array Conversion in TensorFlow 2.x To convert a tensor t to a NumPy array in TensorFlow … Read more
Can you earn money for cryptocurrencies? With the increasing adoption of cryptocurrencies such as Bitcoin, Ethereum, and Cardano, the question naturally arise: can you sell your services for cryptocurrencies BTC, ETH, or ADA instead of USD, EUR, or CHF? The answer is: YES. And it gets better: the main idea of the blockchain is to … Read more