HTML Parser: How to scrap HTML content

Prerequisites Knowledge of the following is required: Python 3 Basic HTML Urllib2 (not mandatory but recommended) Basic OOP concepts Python data structures – Lists, Tuples Why parse HTML? Python is one of the languages that is extensively used to scrap data from web pages. This is a very easy way to gather information. For instance, […]

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How to Pickle: A Pickling and Unpickling Tutorial

Prerequisites Knowledge of  the following is required: Python 3 Basic Python data structures like dictionary File operations in Python Introduction Literally, the term pickle means storing something in a saline solution. Only here, instead of vegetables its objects. Not everything in life can be seen as 0s and 1s (gosh! philosophy), but pickling helps us […]

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The Basics: Concatenating Strings

Concatenating strings basically just means to add a number of strings together to form one longer string. It can be done easily in Python using the ‘+’ symbol. Let’s say you had three strings: “I am”, “Learning”, “Python” To concatenate these, simply add them together using the ‘+’ symbol, like this: >>> print “I am” + “Learning” […]

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The Basics: When to Use the del Statement

Using the del statement is relatively straightforward: it’s used to delete something. Often it’s used to remove an item from a list by referring to the item’s index rather than its value. For example, if you have the following list: list = [4, 8, 2, 3, 9, 7] And you want to remove the number […]

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Introduction to Python Classes (Part 1 of 2)

Classes are a way of grouping related bits of information together into a single unit (also known as an object), along with functions that can be called to manipulate that object (also known as methods). For example, if you want to track information about a person, you might want to record their name, address and […]

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Introduction to Python Classes (Part 2 of 2)

In the first part of this series, we looked at the basics of using classes in Python. Now we’ll take a look at some more advanced topics. Python Class Inheritance Python classes support inheritance, which lets us take a class definition and extend it. Let’s create a new class that inherits (or derives) from the […]

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