Python’s iterators and iterables are two different but related tools that come in handy when you need to iterate over a data stream or container. Iterators power and control the iteration process, while iterables typically hold data that you want to iterate over one value at a time. Iterators and iterables are fundamental components of Python programming, and you’ll have to deal with them in almost all your programs. Learning how they work and how to create them is key […]

The main data structure that you’ll use in NumPy is the N-dimensional array. An array can have one or more dimensions to structure your data. In some programs, you may need to change how you organize your data within a NumPy array. You can use NumPy’s reshape() to rearrange the data. The shape of an array describes the number of dimensions in the array and the length of each dimension. In this tutorial, you’ll learn how to change the shape […]

The terminal can be intimidating to work with when you’re used to working with graphical user interfaces (GUIs). However, it’s an important tool that you need to get used to in your journey as a Python developer. And once you level up your skill of using the terminal, it becomes an extremely powerful tool in your repertoire. With just a few commands in the terminal, you can do tasks that are impossible or at least very tedious to do in […]

# app.py import pandas as pd from dash import Dash, Input, Output, dcc, html data = ( pd.read_csv(“avocado.csv”) .assign(Date=lambda data: pd.to_datetime(data[“Date”], format=”%Y-%m-%d”)) .sort_values(by=”Date”) ) regions = data[“region”].sort_values().unique() avocado_types = data[“type”].sort_values().unique() external_stylesheets = [ { “href”

Because Python has limited parallelism when using threads, using worker processes is a common way to take advantage of multiple CPU cores. The multiprocessing module is built-in to the standard library, so it’s frequently used for this purpose. But while multiple processes let you take advantage of multiple CPUs, moving data between processes can be very slow. And that can reduce some of the performance benefits of using worker processes. Let’s see: Why processes can have performance problems that threads […]