What Does Density On Chest Ct Mean?

descriptor Python tutorial

Raymond Hettinger hat ein Tutorial gegeben, in dem er erklärt wie man mit Hilfe von Deskriptoren den Attributzugriff (lesen, schreiben, löschen) in Python für seine eigenen Zwecke anpassen kann.

The Slides are practically oriented Coming soon should be available online. In the meantime, you can look at its existing descriptor tutorial.

is the way explains how super () works and how to turn functions methods.

Update: The actual films are now in € Python Wiki available.

Thr Bigis Bra U Maker For Awoman

How we develop Launchpad at Canonical (and Bazaar too)

Steve Alexander reported on the development of methods that are used for Launchpad and Bazaar. Steve and I have funny handwritten sheets built, we have photographed.

One of the main problems with which one is in development at Canonical, especially at the Launchpad and Bazaar team, employed is the question how to "Corporate Style Development" with a fully distributed team under one roof gets.

The approach of Canonical approach is this: from methods of agile processes and the community-driven open source development is a emulgate to produce, which they call "Agile community.

To make this process of development at home continuously, Canonical also uses elements of the "LEAN" process. This is originally from the car and the production of Toyota and Kaizen: continuous improvement of products, the organization and processes.

values

account The details of the processes of some fixed elements that Canonical as "values". These values are presented in contrast with the values of "classic" agile development and are based on personal experience:

knowledge and motivation of co-location

Canonical seeks to bring together the best people, and made the experience that it is productive to have the best people to work together over long distances, rather than insist that all work on site, and to be less good developers in the team.

patches integrate with Sprint planning

Canonical most products specifically developed as open source. This leads to code contributions, and do not necessarily fit into their own planning. To make the overall product to as many users as possible, the aim is interesting patches as quickly as possible to transfer into the main line of code.

Community In-House Development

software benefits in various aspects of it if you buy a community to which they actively used, extended and developed. For this it is not always necessary that one's software is open source - extensive interfaces and plug-in systems also help a community to establish themselves and contribute to the development of software.

In comparison to agile development, this is actually a logical extension of the customer-on-site principle.

Builds High

Another updated from the agile development approach: high-quality releases.

Even sitting together teams of defective code is problematic. If, as highly distributed teams an error creeps, this can destroy the basis of time differences quickly all the work days, while waiting for the fix. Therefore, all tests run after every checkin. And actually, they get left in the position after each check-in a high-quality release.

LEAN

Another question for LEAN is how much work is wasted to get to from the beginning of the implementation of a feature to the customer?

LEAN With one tries to achieve high speed of development to it as soon as possible to bring to the customer, for as long as a feature in the works, it causes only cost: the specifications may Change requires attention of the developers, it lacks the customer. The longer this condition, the more expensive the operation is finished.

It is also a waste, if a function has ever been made, and still be in development. For example, due to lack of quality or excessive work packages.

Canonical tries to reduce waste by several methods:

Festivals release cycles

Launchpad has a release cycle of one month for a planning horizon of four months. Ubuntu has a release cycle of 6 months. This makes it easier for the different divisions (Marketing, Testing, Development) to communicate.

Uniform workload

counterexample: If you are just a 1-Monatszyklusansetzt happens in the third week of the following: quality has to happen. This gives each its code tries somehow to get into the release, which leads to increased stress this week (writing code, write tests, other people's code reviewer, ...).

To get around this, has any code Canonical reviewer one day a week on standby (each on different days). This allows each programmer to address the waiting reviewer must immediately and not wait to quality assurance in the third week. Through synchronous communication (IRC, VoIP) is here also avoided wasting, as both reviewers and developers code and concepts just in the head and "swap" does not have to.

will continue the work packages deliberately kept small: every patch must be less than 500 lines including diff context. If it is bigger it must be divided into several smaller units.

Finally, changes are as fast as possible on the trunk played for renewed conflict and thus to avoid waste.

Postgraduate

Steve has also pointed to a paper by Ian Clatworthy in which the thoughts to community-driven development once again recessed are presented.

A Project Report For A New Company

Discouraging the use of Python (or: How to keep the snakes off your plane)

Harald Armin Massa has affected typical FUD arguments to Python in an entertaining presentation and showed their counter arguments.

Sneaking in Python

Python really a sneak everywhere: through mock-applications (which are never replaced), by small scripting tasks by data bank transfers and other programming activities.

The inclined Pointy-Haired Boss (PHB) knows that he must now be careful to avoid that in his department to Python grabs ...

Python is dangerous

... because less code needs to be written .

This requires less programmer, his own department is small, you get a smaller budget, smaller office, and less parking. You lose your power!

But a decent white PHB: Python is only suitable for small applications. But we write large applications. Python can not be used!

... because Python code is more readable.

This enables non-programmers (or programmers of other teams) understand what we do. Others may find errors in our code! The
author of the specifications to check our code to the specification!

for a PHB is no problem: intellectual property rights and business secrets shall be respected. Code can not simply be passed on!

... because even large companies to use Python.

used to be able to argue against Python as PHB by putting on a big company: We are a Microsoft company. We only accept software from big companies (Microsoft, Sun, Oracle, IBM, ...). But that's not today, unfortunately. Even Sun and Microsoft are a Python. Even in the Microsoft Knowledge Base example code will be released in Python.

Luckily Python is not a language first class. Everyone knows that the correct languages. NET does not mean anything iron. When Python would be a first class language, it would have to be called Python #!

... because Python is free.

And not only free (as in freedom) but also free (as in free beer). This department has its own less spending, a smaller budget and (see above) the proper parking lot is at risk!

An experienced PHB, however, knows how important it is to work as a team. To work in a team, we need common goals. Our aim is profit. The objective of a commercial software tool manufacturer is: profit. The goal of the Python manufacturer is not profit. Therefore, we can work with tools from a commercial manufacturer.

... because Python's development process is based on the performance of the members.

course, this is discrimination and violates many many laws, for people who do not provide power to say no!

Note: A good Pointy-Haired Boss know how to avoid Python!