Category: Python

Python tutorials

Python

Evaluate Expressions Dynamically With Python eval()

The built-in Python function eval() is used to evaluate Python expressions. You can pass a string containing Python, or a pre-compiled object into eval() and it will run the code and return the result. Although Python’s eval() is an incredibly useful tool, the function has some important security implications that you should consider before using it. In this course, you’ll learn how eval() works and how to use it safely and effectively in your Python programs. In this tutorial, you’ll […]

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Python

Stochastic Gradient Descent Algorithm With Python and NumPy

Stochastic gradient descent is an optimization algorithm often used in machine learning applications to find the model parameters that correspond to the best fit between predicted and actual outputs. It’s an inexact but powerful technique. Stochastic gradient descent is widely used in machine learning applications. Combined with backpropagation, it’s dominant in neural network training applications. Basic Gradient Descent Algorithm The gradient descent algorithm is an approximate and iterative method for mathematical optimization. You can use it to approach the minimum […]

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Python

Python Web Applications: Deploy Your Script as a Flask App

You wrote a Python script that you’re proud of, and now you want to show it off to the world. But how? Most people won’t know what to do with your .py file. Converting your script into a Python web application is a great solution to make your code usable for a broad audience. In this tutorial, you’ll learn how to go from a local Python script to a fully deployed Flask web application that you can share with the […]

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Python

Plot With Pandas: Python Data Visualization Basics

Whether you’re just getting to know a dataset or preparing to publish your findings, visualization is an essential tool. Python’s popular data analysis library, pandas, provides several different options for visualizing your data with .plot(). Even if you’re at the beginning of your pandas journey, you’ll soon be creating basic plots that will yield valuable insights into your data. In this course, you’ll learn: What the different types of pandas plots are and when to use them How to get […]

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Python

Qt Designer and Python: Build Your GUI Applications Faster

To create a GUI for your windows and dialogs in PyQt, you can take two main paths: you can use Qt Designer, or you can hand code the GUI in plain Python code. The first path can dramatically improve your productivity, whereas the second path puts you in full control of your application’s code. GUI applications often consist of a main window and several dialogs. If you’re looking to create these graphical components in an efficient and user-friendly way, then […]

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Python

Python Inner Functions: What Are They Good For?

Inner functions, also known as nested functions, are functions that you define inside other functions. In Python, this kind of function has direct access to variables and names defined in the enclosing function. Inner functions have many uses, most notably as closure factories and decorator functions. In this tutorial, you’ll learn how to: Provide encapsulation and hide your functions from external access Write helper functions to facilitate code reuse Create closure factory functions that retain state between calls Code decorator […]

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Python

Python Modulo: Using the % Operator

Python supports a wide range of arithmetic operators that you can use when working with numbers in your code. One of these operators is the modulo operator (%), which returns the remainder of dividing two numbers. Modular operations are useful to check if a number is even or odd, simplifying cycling through data, and doing non-decimal based units conversion. In this course, you’ll learn: How modulo works in mathematics How to use the Python modulo operator with different numeric types […]

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Python

Python Microservices With gRPC

Microservices are a way to organize complex software systems. Instead of putting all your code into one app, you break your app into microservices that are deployed independently and communicate with each other. This tutorial teaches you how to get up and running with Python microservices using gRPC, one of the most popular frameworks. Implementing a microservices framework well is important. When you’re building a framework to support critical applications, you must ensure it’s robust and developer-friendly. In this tutorial, […]

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Python

Pandas Sort: Your Guide to Sorting Data in Python

Learning pandas sort methods is a great way to start with or practice doing basic data analysis using Python. Most commonly, data analysis is done with spreadsheets, SQL, or pandas. One of the great things about using pandas is that it can handle a large amount of data and offers highly performant data manipulation capabilities. In this tutorial, you’ll learn how to use .sort_values() and .sort_index(), which will enable you to sort data efficiently in a DataFrame. By the end […]

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Python

Creating PyQt Layouts for GUI Applications

PyQt’s layout managers provide a user-friendly and productive way of arranging graphical components, or widgets, on a GUI. Laying out widgets properly will make your GUI applications look polished and professional. Learning to do so efficiently and effectively is a fundamental skill for you to get up and running with GUI application development using Python and PyQt. In this course, you’ll learn: What the benefits are of using PyQt’s layout managers How to programmatically lay out widgets on a GUI […]

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