Tutorial by Examples: r

A simple OGL 4.0 GLSL shader program that shows how to map a 2D texture on a mesh. The program is executed with a phyton script. To run the script, PyOpenGL and NumPy must be installed. The texture matrix defines how the texture is mapped on the mesh. By manipulating the texture matrix, the textu...

This is an Angular 2 wrapper library for Dropzone. npm install angular2-dropzone-wrapper --save-dev Load the module for your app import { DropzoneModule } from 'angular2-dropzone-wrapper'; import { DropzoneConfigInterface } from 'angular2-dropzone-wrapper'; const DROPZONE_CONFIG: Dropzon...

To ensure that a GPU version TensorFlow process only runs on CPU: import os os.environ["CUDA_VISIBLE_DEVICES"]="-1" import tensorflow as tf For more information on the CUDA_VISIBLE_DEVICES, have a look to this answer or to the CUDA documentation.

import tensorflow as tf sess = tf.Session(config=tf.ConfigProto(device_count={'GPU': 0})) Bear in mind that this method prevents the TensorFlow Graph from using the GPU but TensorFlow still lock the GPU device as described in this an issue opened on this method. Using the CUDA_VISIBLE_DEVICES se...

To use a particular set of GPU devices, the CUDA_VISIBLE_DEVICES environment variable can be used: import os os.environ["CUDA_DEVICE_ORDER"]="PCI_BUS_ID" # see issue #152 os.environ["CUDA_VISIBLE_DEVICES"]="0" # Will use only the first GPU device os.en...

from tensorflow.python.client import device_lib print(device_lib.list_local_devices())

By default, TensorFlow pre-allocate the whole memory of the GPU card (which can causes CUDA_OUT_OF_MEMORY warning). To change this, it is possible to change the percentage of memory pre-allocated, using per_process_gpu_memory_fraction config option, A value between 0 and 1 that indicates wh...

This widget is used to display items with hierarchy. For instance, windows explorer can be reproduced in this way. Some nice tables can be also done using treeview widget. Create the widget tree=ttk.Treeview(master) Definition of the columns You can define how many columns, their width and min...

Each x sigil call respective sigil_x definition Defining Custom Sigils defmodule MySigils do #returns the downcasing string if option l is given then returns the list of downcase letters def sigil_l(string,[]), do: String.Casing.downcase(string) def sigil_l(string,[?l]), do: String.Casing...

This is just the other way of writing Multiple OR conditions. This is not the recommended approach because in regular approach when the condition evaluates to true, it stops executing the remaining conditions which save the time of evaluation, unlike this approach which evaluates all conditions firs...

Copy the content into a file and save the file as .iex.exs in your ~ home directory and see the magic. You can also download the file HERE # IEx.configure colors: [enabled: true] # IEx.configure colors: [ eval_result: [ :cyan, :bright ] ] IO.puts IO.ANSI.red_background() <> IO.ANSI.white() ...

import asyncio async def hello_world(): print('Hello World') loop = asyncio.get_event_loop() loop.run_until_complete(hello_world()) loop.close()

By taking Treeview: Basic example, it can be shown how to customize a basic treeview. In this case, we create a style "mystyle.Treeview" with the following code (see the comments to understand what each line does): style = ttk.Style() style.configure("mystyle.Treeview", highli...

A simple OGL 4.0 GLSL shader program that shows the use of a interface block and a uniform block on a Cook-Torrance microfacet light model implementation. The program is executed with a phyton script. To run the script, PyOpenGL and NumPy must be installed. An Interface Block is a group of GLSL in...

The widget ttk.progress is useful when dealing with long computations so that the user knows that the program is running. Following, an example updating a progressbar each 0.5 seconds is given: Function updating the progressbar def progress(currentValue): progressbar["value"]=curren...

from chempy import Substance ferricyanide = Substance.from_formula('Fe(CN)6-3') ferricyanide.composition == {0: -3, 26: 1, 6: 6, 7: 6} True print(ferricyanide.unicode_name) Fe(CN)₆³⁻ print(ferricyanide.latex_name + ", " + ferricyanide.html_name) Fe(CN)_{6}^{3-}, Fe(CN)<sub>6&...

from chempy import balance_stoichiometry # Main reaction in NASA's booster rockets: reac, prod = balance_stoichiometry({'NH4ClO4', 'Al'}, {'Al2O3', 'HCl', 'H2O', 'N2'}) from pprint import pprint pprint(reac) {'Al': 10, 'NH4ClO4': 6} pprint(prod) {'Al2O3': 5, 'H2O': 9, 'HCl': 6, 'N2': 3} ...

from chempy import Equilibrium from sympy import symbols K1, K2, Kw = symbols('K1 K2 Kw') e1 = Equilibrium({'MnO4-': 1, 'H+': 8, 'e-': 5}, {'Mn+2': 1, 'H2O': 4}, K1) e2 = Equilibrium({'O2': 1, 'H2O': 2, 'e-': 4}, {'OH-': 4}, K2) coeff = Equilibrium.eliminate([e1, e2], 'e-') coeff [4, -5...

from chempy import Equilibrium from chempy.chemistry import Species water_autop = Equilibrium({'H2O'}, {'H+', 'OH-'}, 10**-14) # unit "molar" assumed ammonia_prot = Equilibrium({'NH4+'}, {'NH3', 'H+'}, 10**-9.24) # same here from chempy.equilibria import EqSystem substances = ...

from chempy.electrolytes import ionic_strength ionic_strength({'Fe+3': 0.050, 'ClO4-': 0.150}) == .3 True