Download Python in a Nutshell (2nd Edition) by Alex Martelli PDF

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By Alex Martelli

Python in a Nutshell offers a high-quality, no-nonsense quickly connection with info that programmers depend on the main. This booklet will instantly earn its position in any Python programmer's library.

This e-book deals Python programmers one position to seem once they need assistance remembering or interpreting the syntax of this open resource language and its many strong yet scantily documented modules. This entire reference advisor makes it effortless to appear up the main usually wanted information--not with reference to the Python language itself, but in addition the main usually used components of the traditional library and crucial third-party extensions.

Ask any Python aficionado and you'll pay attention that Python programmers have all of it: a chic object-oriented language with readable and maintainable syntax, that permits for simple integration with elements in C, C++, Java, or C#, and a major choice of precoded general library and third-party extension modules. additionally, Python is straightforward to profit, but strong adequate to tackle the main formidable programming demanding situations. yet what Python programmers used to lack is a concise and transparent reference source, with the fitting degree of steerage in how top to exploit Python's nice strength. Python in a Nutshell fills this need.

Python in a Nutshell, moment Edition covers greater than the language itself; it additionally offers with the main usually used elements of the traditional library, and the preferred and demanding 3rd get together extensions. Revised and multiplied for Python 2.5, this booklet now includes the gory information of Python's new subprocess module and breaking information approximately Microsoft's new IronPython venture. Our "Nutshell" layout suits Python completely by way of providing the highlights of crucial modules and capabilities in its usual library, which conceal over ninety% of your useful programming wishes. This publication includes:

* A fast moving instructional at the syntax of the Python language
* an evidence of object-oriented programming in Python
* assurance of iterators, turbines, exceptions, modules, programs, strings, and ordinary expressions
* a short reference for Python's integrated forms and services and key modules
* Reference fabric on very important third-party extensions, akin to Numeric and Tkinter
* information regarding extending and embedding Python

Python in a Nutshell presents an exceptional, no-nonsense fast connection with info that programmers depend upon the main. This publication will instantly earn its position in any Python programmer's library.

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Adding to the addons path Now that we have a new module, even if minimal, we want to make it available in Odoo. For that, we need to make sure the directory the module is in is part of the addons path. And then we need to update the Odoo module list. Both operations have been explained in detail in the previous chapter, but we will follow here with a brief overview of what is needed. py -d v8dev --addons-path="custom-addons,odoo/addons" --save The --save option saves the options you used in a config file.

Now read the error message in the server log carefully—it should point you to where the problem is. Creating views – form, tree, and search As we have seen, if no view is defined, Odoo will automatically generate basic views to get you going. But surely you would like to define the module views yourself, so that's what we'll do next. Odoo supports several types of views, but the three main ones are: list (also called tree), form, and search views. We'll add an example of each to our module. view model.

The filter domain used is defined the first instruction: it is a list of conditions, where each condition is a tuple. These conditions are implicitly joined with an AND operator ('&' in domain syntax). To add an OR operation a pipe ('|') is used in place of a tuple, and it will affect the next two conditions. We will go into more details about domains in Chapter 6, Views Designing the User Interface. uid) or don't have a current user set ('user_id', '=', False). [ 41 ] Inheritance – Extending Existing Applications What we just did was to completely overwrite the parent method, replacing it with a new implementation.

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