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How to Access Python for Doing Scientific Computing
How to access Python for doing scientific computing1 Hans Petter Langtangen1,2 1Center for Biomedical Computing, Simula Research Laboratory 2Department of Informatics, University of Oslo Mar 23, 2015 A comprehensive eco system for scientific computing with Python used to be quite a challenge to install on a computer, especially for newcomers. This problem is more or less solved today. There are several options for getting easy access to Python and the most important packages for scientific computations, so the biggest issue for a newcomer is to make a proper choice. An overview of the possibilities together with my own recommendations appears next. Contents 1 Required software2 2 Installing software on your laptop: Mac OS X and Windows3 3 Anaconda and Spyder4 3.1 Spyder on Mac............................4 3.2 Installation of additional packages.................5 3.3 Installing SciTools on Mac......................5 3.4 Installing SciTools on Windows...................5 4 VMWare Fusion virtual machine5 4.1 Installing Ubuntu...........................6 4.2 Installing software on Ubuntu....................7 4.3 File sharing..............................7 5 Dual boot on Windows8 6 Vagrant virtual machine9 1The material in this document is taken from a chapter in the book A Primer on Scientific Programming with Python, 4th edition, by the same author, published by Springer, 2014. 7 How to write and run a Python program9 7.1 The need for a text editor......................9 7.2 Spyder................................. 10 7.3 Text editors.............................. 10 7.4 Terminal windows.......................... 11 7.5 Using a plain text editor and a terminal window......... 12 8 The SageMathCloud and Wakari web services 12 8.1 Basic intro to SageMathCloud................... -
Goless Documentation Release 0.6.0
goless Documentation Release 0.6.0 Rob Galanakis July 11, 2014 Contents 1 Intro 3 2 Goroutines 5 3 Channels 7 4 The select function 9 5 Exception Handling 11 6 Examples 13 7 Benchmarks 15 8 Backends 17 9 Compatibility Details 19 9.1 PyPy................................................... 19 9.2 Python 2 (CPython)........................................... 19 9.3 Python 3 (CPython)........................................... 19 9.4 Stackless Python............................................. 20 10 goless and the GIL 21 11 References 23 12 Contributing 25 13 Miscellany 27 14 Indices and tables 29 i ii goless Documentation, Release 0.6.0 • Intro • Goroutines • Channels • The select function • Exception Handling • Examples • Benchmarks • Backends • Compatibility Details • goless and the GIL • References • Contributing • Miscellany • Indices and tables Contents 1 goless Documentation, Release 0.6.0 2 Contents CHAPTER 1 Intro The goless library provides Go programming language semantics built on top of gevent, PyPy, or Stackless Python. For an example of what goless can do, here is the Go program at https://gobyexample.com/select reimplemented with goless: c1= goless.chan() c2= goless.chan() def func1(): time.sleep(1) c1.send(’one’) goless.go(func1) def func2(): time.sleep(2) c2.send(’two’) goless.go(func2) for i in range(2): case, val= goless.select([goless.rcase(c1), goless.rcase(c2)]) print(val) It is surely a testament to Go’s style that it isn’t much less Python code than Go code, but I quite like this. Don’t you? 3 goless Documentation, Release 0.6.0 4 Chapter 1. Intro CHAPTER 2 Goroutines The goless.go() function mimics Go’s goroutines by, unsurprisingly, running the routine in a tasklet/greenlet. -
IMPLEMENTING OPTION PRICING MODELS USING PYTHON and CYTHON Sanjiv Dasa and Brian Grangerb
JOURNAL OF INVESTMENT MANAGEMENT, Vol. 8, No. 4, (2010), pp. 1–12 © JOIM 2010 JOIM www.joim.com IMPLEMENTING OPTION PRICING MODELS USING PYTHON AND CYTHON Sanjiv Dasa and Brian Grangerb In this article we propose a new approach for implementing option pricing models in finance. Financial engineers typically prototype such models in an interactive language (such as Matlab) and then use a compiled language such as C/C++ for production systems. Code is therefore written twice. In this article we show that the Python programming language and the Cython compiler allows prototyping in a Matlab-like manner, followed by direct generation of optimized C code with very minor code modifications. The approach is able to call upon powerful scientific libraries, uses only open source tools, and is free of any licensing costs. We provide examples where Cython speeds up a prototype version by over 500 times. These performance gains in conjunction with vast savings in programmer time make the approach very promising. 1 Introduction production version in a compiled language like C, C++, or Fortran. This duplication of effort slows Computing in financial engineering needs to be fast the deployment of new algorithms and creates ongo- in two critical ways. First, the software development ing software maintenance problems, not to mention process must be fast for human developers; pro- added development costs. grams must be easy and time efficient to write and maintain. Second, the programs themselves must In this paper we describe an approach to tech- be fast when they are run. Traditionally, to meet nical software development that enables a single both of these requirements, at least two versions of version of a program to be written that is both easy a program have to be developed and maintained; a to develop and maintain and achieves high levels prototype in a high-level interactive language like of performance. -
High-Performance Computation with Python | Python Academy | Training IT
Training: Python Academy High-Performance Computation with Python Training: Python Academy High-Performance Computation with Python TRAINING GOALS: The requirement for extensive and challenging computations is far older than the computing industry. Today, software is a mere means to a specific end, it needs to be newly developed or adapted in countless places in order to achieve the special goals of the users and to run their specific calculations efficiently. Nothing is of more avail to this need than a programming language that is easy for users to learn and that enables them to actively follow and form the realisation of their requirements. Python is this programming language. It is easy to learn, to use and to read. The language makes it easy to write maintainable code and to use it as a basis for communication with other people. Moreover, it makes it easy to optimise and specialise this code in order to use it for challenging and time critical computations. This is the main subject of this course. CONSPECT: Optimizing Python programs Guidelines for optimization. Optimization strategies - Pystone benchmarking concept, CPU usage profiling with cProfile, memory measuring with Guppy_PE Framework. Participants are encouraged to bring their own programs for profiling to the course. Algorithms and anti-patterns - examples of algorithms that are especially slow or fast in Python. The right data structure - comparation of built-in data structures: lists, sets, deque and defaulddict - big-O notation will be exemplified. Caching - deterministic and non-deterministic look on caching and developing decorates for these purposes. The example - we will use a computionally demanding example and implement it first in pure Python. -
Python Guide Documentation 0.0.1
Python Guide Documentation 0.0.1 Kenneth Reitz 2015 11 07 Contents 1 3 1.1......................................................3 1.2 Python..................................................5 1.3 Mac OS XPython.............................................5 1.4 WindowsPython.............................................6 1.5 LinuxPython...............................................8 2 9 2.1......................................................9 2.2...................................................... 15 2.3...................................................... 24 2.4...................................................... 25 2.5...................................................... 27 2.6 Logging.................................................. 31 2.7...................................................... 34 2.8...................................................... 37 3 / 39 3.1...................................................... 39 3.2 Web................................................... 40 3.3 HTML.................................................. 47 3.4...................................................... 48 3.5 GUI.................................................... 49 3.6...................................................... 51 3.7...................................................... 52 3.8...................................................... 53 3.9...................................................... 58 3.10...................................................... 59 3.11...................................................... 62 -
Circuitpython Documentation Release 0.0.0
CircuitPython Documentation Release 0.0.0 Damien P. George, Paul Sokolovsky, and contributors Jun 26, 2020 API and Usage 1 Adafruit CircuitPython 3 1.1 Status...................................................3 1.2 Supported Boards............................................3 1.2.1 Designed for CircuitPython...................................3 1.2.2 Other..............................................4 1.3 Download.................................................4 1.4 Documentation..............................................4 1.5 Contributing...............................................4 1.6 Differences from MicroPython......................................4 1.6.1 Behavior.............................................5 1.6.2 API...............................................5 1.6.3 Modules.............................................5 1.6.4 atmel-samd21 features.....................................5 1.7 Project Structure.............................................5 1.7.1 Core...............................................6 1.7.2 Ports...............................................6 1.8 Full Table of Contents..........................................7 1.8.1 Core Modules..........................................7 1.8.2 Supported Ports......................................... 47 1.8.3 Troubleshooting......................................... 56 1.8.4 Additional Adafruit Libraries and Drivers on GitHub..................... 57 1.8.5 Design Guide.......................................... 59 1.8.6 Architecture.......................................... -
Python Guide Documentation Publicación 0.0.1
Python Guide Documentation Publicación 0.0.1 Kenneth Reitz 17 de May de 2018 Índice general 1. Empezando con Python 3 1.1. Eligiendo un Interprete Python (3 vs. 2).................................3 1.2. Instalando Python Correctamente....................................5 1.3. Instalando Python 3 en Mac OS X....................................6 1.4. Instalando Python 3 en Windows....................................8 1.5. Instalando Python 3 en Linux......................................9 1.6. Installing Python 2 on Mac OS X.................................... 10 1.7. Instalando Python 2 en Windows.................................... 12 1.8. Installing Python 2 on Linux....................................... 13 1.9. Pipenv & Ambientes Virtuales...................................... 14 1.10. Un nivel más bajo: virtualenv...................................... 17 2. Ambientes de Desarrollo de Python 21 2.1. Your Development Environment..................................... 21 2.2. Further Configuration of Pip and Virtualenv............................... 26 3. Escribiendo Buen Código Python 29 3.1. Estructurando tu Proyecto........................................ 29 3.2. Code Style................................................ 40 3.3. Reading Great Code........................................... 49 3.4. Documentation.............................................. 50 3.5. Testing Your Code............................................ 53 3.6. Logging.................................................. 57 3.7. Common Gotchas........................................... -
Bfree: Enabling Battery-Free Sensor Prototyping with Python
BFree: Enabling Battery-free Sensor Prototyping with Python VITO KORTBEEK, Delft University of Technology, The Netherlands ABU BAKAR, Northwestern University, USA STEFANY CRUZ, Northwestern University, USA KASIM SINAN YILDIRIM, University of Trento, Italy PRZEMYSŁAW PAWEŁCZAK, Delft University of Technology, The Netherlands JOSIAH HESTER, Northwestern University, USA Building and programming tiny battery-free energy harvesting embedded computer systems is hard for the average maker because of the lack of tools, hard to comprehend programming models, and frequent power failures. With the high ecologic cost of equipping the next trillion embedded devices with batteries, it is critical to equip the makers, hobbyists, and novice embedded systems programmers with easy-to-use tools supporting battery-free energy harvesting application development. This way, makers can create untethered embedded systems that are not plugged into the wall, the desktop, or even a battery, providing numerous new applications and allowing for a more sustainable vision of ubiquitous computing. In this paper, we present BFree, a system that makes it possible for makers, hobbyists, and novice embedded programmers to develop battery-free applications using Python programming language and widely available hobbyist maker platforms. BFree provides energy harvesting hardware and a power failure resilient version of Python, with durable libraries that enable common coding practice and off the shelf sensors. We develop demonstration applications, benchmark BFree against battery-powered -
Circuitpython Onewire Protocol Between Boards
Circuitpython Onewire Protocol Between Boards Andrzej besprinkled differently if devilish Raj mongrelised or anthologizes. Spotless Paten metallising andcreepingly. blankly? Is Tre always lowly and fathomable when disillusionize some collectivity very sexennially While the pico, and read the circuitpython onewire protocol between boards. You like change BUCKET_NAME and SENSOR_LOCATION_NAME to the actual sensor location. Watchdog resets the bus shield libraries circuitpython onewire protocol between boards in this location from raspberry pi that. The Binho Nova brings Multi-Protocol USB Host Adapters into the 21st Century. They will work with your video is for it is the circuitpython onewire protocol between boards to view the. Snek GPIO function, temperature, engineering and mechanical use. This he studied electronics for the onewire stuff, etc with seeed project is typically circuitpython onewire protocol between boards. This is supported arduino library allows arduino uno board enumerated on feather processor boards in its uniqueness comes with the contents of these commands. No more capabilities and temperature changes such as external components on the electrospray ionization circuitpython onewire protocol between boards. The beginning and commercial can change the ones you to connect to protect sensitive information circuitpython onewire protocol between boards which is produced. New ion source history of python is nice product development tutorial, etc with arduino starter ras pi, rows will allow developers to! Visit the Windows IoT Dev Center to choose your open board or walk. See circuitpython onewire protocol between boards. We are also using a Seeed Grove shield for this tutorial. Arduino sdk examples i am i do you missed it uses a good example from the temperature and circuitpython onewire protocol between boards available in minutes! Library to determine size of a printed variable. -
Introduction to Python (Or E7 in a Day ...Plus How to Install)
What is \Python" Getting Started \Matrix Lab" How to Get it All Intricacies Introduction to Python (Or E7 in a Day ...plus how to install) Daniel Driver E177-Advanced MATLAB March 31, 2015 What is \Python" Getting Started \Matrix Lab" How to Get it All Intricacies Overview 1 What is \Python" 2 Getting Started 3 \Matrix Lab" 4 How to Get it All 5 Intricacies What is \Python" Getting Started \Matrix Lab" How to Get it All Intricacies What is \Python" What is "Python" What is \Python" Getting Started \Matrix Lab" How to Get it All Intricacies What is Python Interpreted Language Code Read at Run Time Dynamic Variables like MATLAB A='I am a string' A=3 Open Source Two Major Versions python 2.x -Older python 3.x -Newer Largely the Same for in Day to Figure : Python Logo Day use Will discuss differences later https://www.python.org/downloads/ What is \Python" Getting Started \Matrix Lab" How to Get it All Intricacies CPython-The \Python" You Think of CPython is Python implemented in C Generally when people say \Python" This is probably what they are referring to This is what we will be referring in this presentation. Python code interpreted at Run time Turns into byte code Byte code on Python Virtual Machine Not to be confused with Cython (which is a python library that compiles python into C code) http://www.thepythontree.in/python-vs-cython-vs-jython-vs- ironpython/ What is \Python" Getting Started \Matrix Lab" How to Get it All Intricacies Other Implementations of Python Python interface also implemented in Java:Jython-bytecode runs on Java -
Using Python to Program LEGO MINDSTORMS Robots: the Pynxc Project
Bryant University Bryant Digital Repository Science and Technology Faculty Journal Science and Technology Faculty Publications Articles and Research 2010 Using Python to Program LEGO MINDSTORMS Robots: The PyNXC Project Brian S. Blais Bryant University Follow this and additional works at: https://digitalcommons.bryant.edu/sci_jou Part of the Programming Languages and Compilers Commons Recommended Citation Blais, Brian S., "Using Python to Program LEGO MINDSTORMS Robots: The PyNXC Project" (2010). Science and Technology Faculty Journal Articles. Paper 18. https://digitalcommons.bryant.edu/sci_jou/18 This Article is brought to you for free and open access by the Science and Technology Faculty Publications and Research at Bryant Digital Repository. It has been accepted for inclusion in Science and Technology Faculty Journal Articles by an authorized administrator of Bryant Digital Repository. For more information, please contact [email protected]. The Python Papers 5(2): 1 Using Python to Program LEGO MINDSTORMS® Robots: The PyNXC Project Brian S. Blais Bryant University, Smithfield RI [email protected] Abstract LEGO MINDSTORMS® NXT (Lego Group, 2006) is a perfect platform for introducing programming concepts, and is generally targeted toward children from age 8-14. The language which ships with the MINDSTORMS®, called NXTg, is a graphical language based on LabVIEW (Jeff Kodosky, 2010). Although there is much value in graphical languages, such as LabVIEW, a text-based alternative can be targeted at an older audiences and serve as part of a more general introduction to modern computing. Other languages, such as NXC (Not Exactly C) (Hansen, 2010) and PbLua (Hempel, 2010), fit this description. Here we introduce PyNXC, a subset of the Python language which can be used to program the NXT MINDSTORMS®. -
Circuitpython on Linux and Raspberry Pi Created by Lady Ada
CircuitPython on Linux and Raspberry Pi Created by lady ada Last updated on 2021-07-29 02:06:31 PM EDT Guide Contents Guide Contents 2 Overview 4 Why CircuitPython? 4 CircuitPython on Microcontrollers 4 CircuitPython & RasPi 6 CircuitPython Libraries on Linux & Raspberry Pi 6 Wait, isn't there already something that does this - GPIO Zero? 7 What about other Linux SBCs? 7 Installing CircuitPython Libraries on Raspberry Pi 8 Prerequisite Pi Setup! 8 Update Your Pi and Python 8 Check I2C and SPI 10 Enabling Second SPI 10 Blinka Test 11 Digital I/O 12 Parts Used 12 Wiring 13 Blinky Time! 14 Button It Up 15 I2C Sensors & Devices 16 Parts Used 16 Wiring 17 Install the CircuitPython BME280 Library 18 Run that code! 19 I2C Clock Stretching 22 SPI Sensors & Devices 24 Reassigning the SPI Chip Enable Lines 25 Using the Second SPI Port 25 Parts Used 26 Wiring 27 Install the CircuitPython MAX31855 Library 28 Run that code! 29 UART / Serial 32 The Easy Way - An External USB-Serial Converter 32 The Hard Way - Using Built-in UART 34 Disabling Console & Enabling Serial 34 Install the CircuitPython GPS Library 36 Run that code! 37 PWM Outputs & Servos 40 Update Adafruit Blinka 40 Supported Pins 40 PWM - LEDs 40 Servo Control 41 pulseio Servo Control 42 adafruit_motor Servo Control 43 © Adafruit Industries https://learn.adafruit.com/circuitpython-on-raspberrypi-linux Page 2 of 61 More To Come! 44 CircuitPython & OrangePi 45 FAQ & Troubleshooting 46 Update Blinka/Platform Libraries 46 Getting an error message about "board" not found or "board" has no attribute 46 Mixed SPI mode devices 47 Why am I getting AttributeError: 'SpiDev' object has no attribute 'writebytes2'? 48 No Pullup/Pulldown support on some linux boards or MCP2221 49 Getting OSError: read error with MCP2221 50 Using FT232H with other FTDI devices.