All lecture and tutorial examples require the following in order to work:
    - Python 3.8
    - A python virtual environment
    - Flask
    - zappa
    - AWS CLI 

Perform these steps to run the examples:

1) Install python 3.8 by following the instructions for your respective platform available at https://www.python.org/

2) Download and unpack the example sources:

   a) Download the example sources,
   b) Open a shell and navigate to the location of the tar.gz file
   c) Uncompress and untar (e.g., tar -xzf solution.tar.gz)
   d) Go into the example directory (e.g., cd solution)

3) Create a new python virtual environment as follows:

   python -m venv venv

   For some platforms substitute python for python3 or python3.6

4) Activate the virtual environment

   source venv/bin/activate

5) Install Flask and Zappa

   pip install zappa flask

   Note for OSX users: If installation fails, add the following lines to your ~/.profile or ~/.bashrc and retry:

   	LANG="en_US.UTF-8"

6) Install AWS Command Line Interface (CLI)

   Follow instruction in https://aws.amazon.com/cli/

7) Install older version of troposphere required by zappa 

   pip install -r requirements.txt

8) Before you can begin using zappa, you should set up authentication
credentials. Credentials for your AWS account can be found in the IAM
Console at https://console.aws.amazon.com/iam/home?#. You can create
or use an existing user. Go to manage access keys and generate a new
set of keys.  You will need both the aws_access_key_id and
aws_secret_access_key.

9) Configure your credentials

   aws configure

10) Edit the file zappa_settings.json.  Set the value of the key "s3_bucket" to
   the name of one of your existing S3 buckets.

11) Deploy the example on AWS Lambda

   zappa deploy dev