Python Backend

This repository contains some examples of backend applications using:

1. Flask
2. Django
3. Fast API

Creating a virtual environment

There are two ways of creating a virtual environment in python.

1. creating a virtual environment from a already exists folder.

• to create a virtual environment in the existing folder you first need to navigate to the folder that you wnt to create virtual environment by running the command:

cd myv

• then you run the following command to create a virtual environment

virtualenv .

This just means create a virtual environment in the current directory.

2. creating a virtual environment and naming it.

• to create a virtual environment by name you run the following command:

virtualenv venv

Activating virtual environment

To activate virtual environment you have to run the activate.bat file that will be generated in virtual environment that you have created for example:

.\venv\Scripts\activate
# or
.\venv\Scripts\activate.bat

Activating the first virtual (myv) you will do it as follows:

.\Scripts\activate
# or
.\Scripts\activate.bat

Deactivating virtual environment

To deactivate virtual environment you have to run the deactivate.bat file that will be generated in virtual environment that you have created for example:

.\venv\Scripts\deactivate
# 1.
.\venv\Scripts\deactivate.bat

Activating the first virtual (myv) you will do it as follows:

.\Scripts\deactivate
# 1.
.\Scripts\deactivate.bat

I recommend to navigate to the project directory after creating a virtual environment before installing packages:

📁 root
    📁 venv

To install the packages after activating the virtual environment you just run the following command:

pip install <package_name>

# example

pip install numpy

Getting an error?

If you are getting a command error that says:

'virtualenv' is not recognized as an internal or external command,
operable program or batch file.

You could try to install virtualenv using pip as follows:

pip install virtualenv

Or

python -m pip install virtualenv