python – JoFre.de

Entwicklung eines KI-gestützten Sprachassistenten in Python

Hallo zusammen, falls ihr schon mal mit dem Gedanken gespielt habt eine eigene Alexa oder Cortana zu entwickeln, möchte ich euch meinen Kurs “Entwicklung eines KI-gestützten Sprachassistenten in Python” empfehlen. Dabei geht es darum von Grund auf ein System zu entwickeln, dass Sprache und Wünsche eines Menschen versteht und eine entsprechende Antwort oder Aktion generiert.

Der Inhalt ist so aufgebaut:

Aufsetzen einer Entwicklungsumgebung in Python
Sprachverständnis und -synthese
Implementierung einer Konfiguration der Anwendung
Erstellen eines Intent (Skill) Systems
Dynamisches Laden von Intents zur Laufzeit
Implementierung von 10 Beispiel-Intents
Eine einfache UI entwickeln
Build und Paketieren der Anwendung als Binary und Installer

Für jedes Kapitel stelle ich funktionierenden Quelltext bereit, an dem ihr euch orientieren könnt. Ich freue mich drauf den ein oder anderen hier wiederzusehen 🙂

https://www.udemy.com/course/ki-sprachassistent/

Export Jupyter Notebook as Tex on CentOS

Today I tried to figure out how to print a Jupyter Notebook as Tex file including all images on a CentOS 7 installation. After a while I found the following packages which are required to succesfully generate the files:

yum -y install texlive texlive-latex texlive-xetex
yum -y install texlive-collection-latex
yum -y install texlive-collection-latexrecommended
yum -y install texlive-xetex-def
yum -y install texlive-collection-xetex
yum -y install texlive-collection-latexextra
yum -y install texlive-adjustbox
yum -y install texlive-upquote

After that, just call:

pdflatex mytex.tex

Building OpenCV 3.4 on Raspberry Pi

I’ve read many tutorials about building and installing OpenCV on a Raspberry Pi but they either did not work or were outdated. Hence, I decided to write down all steps required to build and install OpenCV 3.4.

 
# Update your system
sudo rpi-update
sudo apt-get update
sudo apt-get upgrade
 
# Change swap size
sudo nano /etc/dphys-swapfile
# Change this... CONF_SWAPSIZE=100 to this
CONF_SWAPSIZE=1024
 
# Restart service
sudo /etc/init.d/dphys-swapfile stop
sudo /etc/init.d/dphys-swapfile start
 
# Install packages
sudo apt-get install build-essential cmake cmake-curses-gui pkg-config
sudo apt-get install libatlas-base-dev gfortran
sudo apt-get install \
  libjpeg-dev \
  libtiff5-dev \
  libjasper-dev \
  libpng12-dev \
  libavcodec-dev \
  libavformat-dev \
  libswscale-dev \
  libeigen3-dev \
  libxvidcore-dev \
  libx264-dev \
  libgtk2.0-dev
 
sudo apt-get -y install libv4l-dev v4l-utils
 
sudo apt-get install python2.7-dev
sudo apt-get install python3-dev
 
pip install numpy
pip3 install numpy
 
# Install OpenCV
wget https://github.com/opencv/opencv/archive/3.4.0.zip -O opencv.zip
wget https://github.com/opencv/opencv_contrib/archive/3.4.0.zip -O opencv_contrib.zip
 
unzip opencv.zip
unzip opencv_contrib.zip
 
cd opencv-3.4.0
mkdir build
cd build
 
sudo cmake -D CMAKE_BUILD_TYPE=RELEASE \
    -D CMAKE_INSTALL_PREFIX=/usr/local \
    -D BUILD_WITH_DEBUG_INFO=OFF \
    -D BUILD_DOCS=OFF \
    -D BUILD_EXAMPLES=OFF \
    -D BUILD_TESTS=OFF \
    -D BUILD_opencv_ts=OFF \
    -D BUILD_PERF_TESTS=OFF \
    -D INSTALL_C_EXAMPLES=OFF \
    -D INSTALL_PYTHON_EXAMPLES=ON \
    -D OPENCV_EXTRA_MODULES_PATH=../../opencv_contrib-3.4.0/modules \
    -D ENABLE_NEON=ON \
    -D WITH_LIBV4L=ON \
        ..
 
sudo make -j3
sudo make install
sudo ldconfig
 
# Fix library file name
cd /usr/local/lib/python3.5/dist-packages/
sudo mv cv2.cpython-35m.so cv2.so

TensorFlow For Poets – Retrain Inception behind a Proxy

I tried to retrain Google’s Inception as described here. I failed since I use a proxy what has not been considered when implementing the retrain.py script.

So what I did to solve it is to find the following line in the script:

filepath, _ = urllib.request.urlretrieve(DATA_URL, filepath, _progress)

… and add the following code above the line:

proxy = urllib.request.ProxyHandler({'http': r'http://user:password@proxy.domain.de:8080'})
auth = urllib.request.HTTPBasicAuthHandler()
opener = urllib.request.build_opener(proxy, auth, urllib.request.HTTPHandler)
urllib.request.install_opener(opener)

Now tensorflow can download the required files.

Install Python, Scikit and Tensorflow on Windows

Lately, I worked through Google‘s fantastic machine learning tutorial by Josh Gordon that you can find here. On a windows machine installing the required components is not easy and documented somewhat cryptically. As a consequence, I decided to write the necessary steps down so that you can step through the easily.

Download and install Python 3.5.3 from the official website. Tensorflow requires us to use version 3.5.x on windows so make sure that you don’t use 2.x or 3.6.x.
Install scikit-learn, tensorflow and pydotplus from the command line: pip install scikit-learn pydotplus tensorflow If you are using a proxy call pip with the proxy parameter (e.g. pip –proxy http://user:password@proxy.mydomain.com:8080 install scikit-learn pydotplus tensorflow)
Install GraphViz from the official website and add its binary folder to your PATH variable (e.g. C:\Program Files (x86)\Graphviz2.38\bin).
Download and install the compiled binaries for numpy 1.13 and scipy 0.19.0 from Christoph Gohlke‘s website. Higher versions might work as well. By downloading the pre-compiled binaries we avoid to install multiple compilers on our system. When downloading make sure to grab the right packages for Python 3.5 (…cp35…) and win64.
Install both packages using pip:
1. pip install C:\Users\admin\Downloads\numpy-1.13.0rc2+mkl-cp35-cp35m-win_amd64.whl
2. pip install C:\Users\admin\Downloads\scipy-0.19.0-cp35-cp35m-win_amd64.whl

Thats it, not you can use Scikit and Tensorflow on windows!