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In this tutorial, we are going to build a Graphical User Interface (GUI) to acquire images from your webcam. We are going to use OpenCV to quickly acquire an image from your camera and PyQt5 to build the user interface. You may find a lot of tutorials online on how …

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To understand hashable objects in Python, it is important to review what a hash table is. Following the article on Wikipedia, a hash table is a data structure that can map keys to values and that implements a hash function to compute the index to an array of buckets or …

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We have seen how to leverage the differences between mutable and immutable objects and what happens when you use mutable types as default function arguments. However, we haven't discussed what happens when you use mutable types as default attributes of classes.

Default values for attributes can be defined in different …

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Broadly speaking, Python variables belong to one of two types: mutable and immutable. We have discussed this yesterday, in the Introduction To Mutable and Immutable Data Types. The first one refers to those elements that can be changed without the need of creating a new one, while the latter refers …

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People who start programming in Python quickly stumble upon the existence of lists and tuples. They are defined in a similar way, they look the same. Sometimes they are even used interchangeably. The obvious question is, therefore, why do you have two different types of elements for the same goal …

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This article is part of a series of articles relating to data storage with Python. The other articles are:

Using databases for storing data may sound much more complicated …

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This article is part of a series of articles relating to data storage with Python. The other articles are:

Last week we have seen how to store data into …

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This is the first of a series of articles relating to data storage with Python. The other articles are:

Storing data to reuse it later is a central part in most Python applications. Whether …

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We are going to cover from the basics of error handling to defining your own exceptions. You will learn why sometimes it is better not to catch exceptions and how to develop a pattern that can be useful for future users of your code. Exceptions are a crucial part of …

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If you have ever followed a guide on how to start programming, most likely you have encounter reflections about the importance of adding comments to your code. Comments allow you to understand what the developer was thinking when programming, maybe left some traces of what could be improved. If you …

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Probably you have run into the problem of wanting to update a plot while acquiring a signal, but finding that Python is busy during the acquisition. This happens, for example, when functions or methods take long to execute and you can't regain control until it is done. Python has at …

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Python is an object-oriented programming (OOP) language. Object-oriented programming is a programming design that allows developers not only to define the type of data of a variable but also the operations that can act on that data. For example, a variable can be of type integer, float, string, etc. We …

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