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Monthly Archives: June 2021

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Recursion: introduction and binary trees

  • Post author:gwarowe
  • Post published:28 June 2021
  • Post category:Python
  • Post comments:0 Comments

[latexpage] A recursive function is one that calls itself. We can illustrate this with the usual example: the factorial function. Before presenting the example, however, it's advisable to begin with…

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Handling errors with exceptions

  • Post author:gwarowe
  • Post published:24 June 2021
  • Post category:Python
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Input errors One of the most tedious jobs in writing code designed to be used by others is checking a user's input to make sure it's valid. As an example,…

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Writing and reading Python objects – the pickle module

  • Post author:gwarowe
  • Post published:21 June 2021
  • Post category:Python
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We've seen how to write and read text files. This is fine if you want to store the data in a human readable form or transfer the data to some…

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Writing and reading text files

  • Post author:gwarowe
  • Post published:19 June 2021
  • Post category:Python
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Writing and reading text files in Python is fairly straightforward. It's easiest to illustrate the process with an example. Here is some code that generates the 52 cards in a…

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Overloading comparison operators

  • Post author:gwarowe
  • Post published:17 June 2021
  • Post category:Python
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[latexpage] Overloading the six comparison operators works in a similar way to the overloading of arithmetic operators. The operators and their associated methods are: Default behaviour Before we try overloading…

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Overloading arithmetic operators

  • Post author:gwarowe
  • Post published:13 June 2021
  • Post category:Python
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[latexpage] We've seen that the usual arithmetic operators +, -, * and / can be used with Python's numeric data types, and that some of these operators also have meaning…

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Single inheritance and the super() function: the basics

  • Post author:gwarowe
  • Post published:4 June 2021
  • Post category:Python
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[latexpage] One of the cornerstones of OOP is the concept of inheritance. The idea is best illustrated with an example. Suppose we have a number of objects that all have…

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Encapsulation and private data

  • Post author:gwarowe
  • Post published:2 June 2021
  • Post category:Python
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Programmers used to other object oriented languages such as C++, C# or Java will be familiar with the idea of private data fields and methods within a class. These private fields…

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