How to Use Python’s xrange and range

Python has two handy functions for creating lists, or a range of integers that assist in making for loops. These functions are xrange and range. But you probably already guessed that! The Difference Between xrange and range in Python Before we get started, let’s talk about what makes xrange and range different. For the most […]

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How to Sort a List, Tuple or Object (with sorted) in Python

Sorting a list or tuple is easy in Python! Since a tuple is basically like an array that is not modifiable, we’ll treat it almost the same as a list. Sorting a Python List the Simple Way Okay, so if you only want to sort a list of numbers, Python has a built in function […]

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How to Check if a List, Tuple or Dictionary is Empty in Python

The preferred way to check if any list, dictionary, set, string or tuple is empty in Python is to simply use an if statement to check it. For example, if we define a function as such:

It will magically detect if any built in structure is empty. So if we run this:

Then, […]

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How to Implement an ‘enum’ in Python

What is enum and why we need it An enumerated type, a.k.a. enum, is a data type consisting of a set of named values called elements, members or enumerators of the type. These enumerated named values function as constants in the computing language. For example, a COLOR enum may include named values such as RED, […]

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How to get an attribute from an object in Python

Once we know how to check if an object has an attribute in Python, the next step is to get that attribute. In Python, besides the normal dot-style attribute access, there’s a built-in function, getattr, which is also very useful for accessing an attribute. Python’s getattr The built-in function getattr(object, name[, default]) returns the value […]

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How to check if an object has an attribute in Python

Since everything in Python is an object and objects have attributes (fields and methods), it’s natural to write programs that can inspect what kind of attributes an object has. For example, a Python program could open a socket on the server and it accepts Python scripts sent over the network from a client machine. Upon […]

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How to get and format the current time in Python

Time review Time as we know is represented by several components, some of which are numerical such as seconds, minutes and hours while others are strings such as timezone, AM and PM. Python provides an arsenal of utilities when dealing with time objects and strings. Therefore, it is relatively easy to get and format the […]

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How to Sort Python Dictionaries by Key or Value

Note: If you want to sort a list, tuple or object in Python, checkout this article: How to Sort a List or Tuple in Python The dict (dictionary) class object in Python is a very versatile and useful container type, able to store a collection of values and retrieve them via keys. The values can be objects of any type […]

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How to Traverse a Directory Tree in Python – Guide to os.walk

When you use a scripting language like Python, one thing you will find yourself doing over and over again is walking a directory tree, and processing files. While there are many ways to do this, Python offers a built-in function that makes this process a breeze. Basic Python Directory Traversal Here’s a really simple example […]

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How to Create a Thread in Python

Introduction to Python threads What are threads? Simply put, try to imagine them as running several programs concurrently, in a single process. When you create one or more threads in your program, they get executed simultaneously, independent of each other, and most importantly, they can share information among them without any extra difficulty. These features […]

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