Installing the packages

Let's quickly review how you can install the required packages:

• Flask: You can install Flask (http://flask.pocoo.org/) with the following command:

$ pip install flask

To check if the installation has been performed correctly, just open a Python shell and try to import the Flask library:

python
import Flask

• TensorFlow: You can install TensorFlow (https://www.tensorflow.org/install/) with the following command:

$ pip install tensorflow

To check if the installation has been performed correctly, just open a Python shell and try to import the TensorFlow library:

python
import tensorflow

• Keras: You can install Keras (https://keras.io/) with the following command:

$ pip install keras

To check if the installation has been performed correctly, just open a Python shell and try to import the Keras library:

python
import keras

• Requests: You can install Requests (http://docs.python-requests.org/en/master/) with the following command:

$ pip install requests

To check if the installation has been performed correctly, just open a Python shell and try to import the requests library:

python
import requests

• Pillow: In order to install Pillow (https://pypi.org/project/Pillow/), use the following command:

pip install Pillow

To check if the installation has been performed correctly, just open a Python shell and try to import the Pillow library:

python
import PIL

I would like to mention that the recommended approach is to install packages in virtual environments. See Chapter 1, Setting Up OpenCV, to learn more about creating and managing virtual environments.