Fluent Python: Clear, Concise, and Effective Programming by Luciano Ramalho

By Luciano Ramalho

Python's simplicity enables you to develop into effective speedy, yet this usually capability you are not utilizing every thing it has to provide. With this hands-on consultant, you will the right way to write potent, idiomatic Python code by way of leveraging its top - and doubtless such a lot overlooked - positive factors. writer Luciano Ramalho takes you thru Python's center language beneficial properties and libraries, and exhibits you the way to make your code shorter, quicker, and extra readable while. Many skilled programmers try and bend Python to slot styles they realized from different languages, and not notice Python good points open air in their adventure. With this publication, these Python programmers will completely how one can turn into trained in Python three.

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Extra resources for Fluent Python: Clear, Concise, and Effective Programming

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David Beazley has two books covering the Data Model in detail in the context of Python 3: Python Essential Reference, 4th Edition, and Python Cookbook, 3rd Edition, coauthored with Brian K. Jones. The Art of the Metaobject Protocol (AMOP), by Gregor Kiczales, Jim des Rivieres, and Daniel G. Bobrow explains the concept of a MOP (Meta Object Protocol), of which the Python Data Model is one example. Soapbox Data Model or Object Model? What the Python documentation calls the “Python Data Model”, most authors would say is the “Python Object Model”.

See Figure 2-2. 2. py script in the Fluent Python code repository is a simple speed test comparing listcomp with filter/map. info | 23 Figure 2-2. The cartesian product of a sequence of three card ranks and a sequence of four suits results in a sequence of twelve pairings. For example, imagine you need to produce a list of t-shirts available in two colors and three sizes. Example 2-4 shows how to produce that list using a listcomp. The result has 6 items. Example 2-4. Cartesian product using a list comprehension.

The explicit conversion to bool is needed because __bool__ must return a boolean and or returns either operand as is: x or y evaluates to x if that is truthy, otherwise the result is y, whatever that is. Overview of special methods The Data Model page of the Python Language Reference lists 83 special method names, 47 of which are used to implement arithmetic, bitwise and comparison operators. info As an overview of what is available, see Table 1-1 and Table 1-2. The grouping shown in the following tables is not exactly the same as in the official documentation.

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