update installation_file.txt

installation_file.txt

-sudo apt-get install python3-venv (déjà installé)
-sudo apt-get install libatlas-base-dev
-mkdir python-virtual-environments
-cd python-virtual-environments
-python3 -m venv ohmpi
-source ohmpi/bin/activate
-pip install RPi.GPIO
-pip install adafruit-blinka
-pip install numpy
-pip install adafruit-circuitpython-ads1x15
+libraries to install using the package manager : libatlas-base-dev
+    sudo apt-get install libatlas-base-dev
+python libraries dependencies :
+Adafruit-Blinka==3.2.0
+adafruit-circuitpython-ads1x15==2.1.1
+adafruit-circuitpython-busdevice==4.0.1
+Adafruit-PlatformDetect==1.3.8
+Adafruit-PureIO==1.0.4
+numpy==1.17.4
+pandas==0.25.3
+pkg-resources==0.0.0
+python-dateutil==2.8.1
+pytz==2019.3
+rpi-ws281x==4.2.2
+RPi.GPIO==0.7.0
+six==1.13.0
+spidev==3.4
+sysv-ipc==1.0.1