[toc] Overview Problem Statement: Given a Pandas Dataframe, how to get the row count of the data frame? Example: In the following example, we have a dataframe that has 5 rows in it. Thus, the question here is how do we get the number of rows in the dataframe? (Output expected is 5 in this … Read more
Syntax object.__bool__(self) The Python __bool__() method implements the built-in bool() function. So, when you cal bool(x), Python attempts to call x.__bool__(). If the return value is not a Boolean, Python raises a TypeError. We call this a “Dunder Method” for “Double Underscore Method” (also called “magic method”). To get a list of all dunder methods … Read more
Annotations are defined in PEP 3107 allow you to add arbitrary metadata to the parameters and return values of functions. The __annotations__ attribute of a function object stores those annotations in a dictionary mapping function parameters or the return value to the specified annotations. Let’s have a look at a couple of examples next. Parameter … Read more
Everybody talks about passive income these days. Is it a scam? Yes and no. Nothing can exist passively for an unlimited time. Here’s what passive income really means: passive income is a more or less slowly dying income stream. But the idea is still powerful and transformative. And there are a lot of income streams … Read more
This is the first part of a 3-part series on the Python request library: Python Requests Library – Your First HTTP Request in Python Python Requests Library – Understanding requests.get() Parameters Python Requests Library – Exception Handling & Advanced request.get() Parameters Syntax Background & Preparation The Requests library has several methods for GET. Part 1 … Read more
This is the first part of a 3-part series on the Python request library: Python Requests Library – Your First HTTP Request in Python Python Requests Library – Understanding requests.get() Parameters Python Requests Library – Exception Handling & Advanced request.get() Parameters Syntax Background There are many libraries around that make HTTP requests. However, the requests … Read more
This article explains how to use the REST API to access FTX in Python so that you can build your trading program. As you go through the article, you can also watch our article tutorial video: What is FTX? FTX is an exchange where users can trade various digital assets, such as cryptocurrencies, tokenised stocks … Read more
How can you easily attract clients as a freelance programmer? You’ve mastered the first level as a freelance programmer and wonder how to make it easier to get clients? Or you’re generally interested in becoming a freelancer but you don’t know how to get clients? Here’s a major building block of your success: ? Create … Read more
What is a Depth-First Search (DFS) Algorithm? Building on our previous story about graphs and graph traversal algorithms, this time we will look into a depth-first search algorithm. A depth-search algorithm also traverses a graph by exploring it vertex-by-vertex, but it does it by following the vertical order of the vertices. Although the depth-first search … Read more
Method Name Method Description dict.clear() Removes all elements from the dictionary dict.copy() Creates a shallow copy of the dictionary dict.fromkeys() Create a new dictionary from a given iterable of keys dict.get() Returns value associated with a key, or default value if key does not exist dict.items() Outputs a list of (key, value) tuple pairs of … Read more
💡 Summary: To get a list of all the keys stored in a dictionary, use the dict.keys() method that returns a dict_keys object that is iterable but not ordered and not subscriptable. In this article, I will show some examples of the dict.keys() method to, hopefully, give you a better idea of how the method … Read more
Summary: When working with Python dictionaries, in some cases you may want to access a specific value of a certain item, this is where the dict.get() method comes in handy. Definition: Python’s dict.get() method expects a key argument. If the specified key is in the dictionary, the method will output the value associated with the … Read more