diff --git a/content/python/concepts/virtual-environment/virtual-environment.md b/content/python/concepts/virtual-environment/virtual-environment.md new file mode 100644 index 00000000000..83353e5eef7 --- /dev/null +++ b/content/python/concepts/virtual-environment/virtual-environment.md @@ -0,0 +1,107 @@ +# Python Virtual environments + +## Introduction + +The virtual environments in Python are an excellent resource for managing and controlling the dependencies when working with a particular project. + +As the name may suggest, it is a virtual space when the developer can configure all requisites, dependencies that are needed for the task. +The developer can isolate the conditions for this project using dependencies, fixed version of that dependencies, and those will only be available inside the virtual environment and not in the whole operative system. + +## How to use it? +In order to create a virtual environment in Python, these are the steps: +Open the terminal. +Enter “python -m venv |name_of_environment|” +Activate the virtual environment by entering: “source environment/bin/activate” for Unix systems and “env/Scripts/activate” for Windows. +To deactivate/exit from the environment just type in the console “deactivate”. +If it is required to check the version of the dependencies in use, the command “pip freeze” is useful. + +There’s one option where python can create a requirements file in case it is needed to communicate to other colleagues about the requirements needed to run the virtual environment with the same dependencies. + +Typing “pip freeze > requirements.txt” will create a requirements file with such name containing all what other team member will need to run the environment it the computer. +The just would have to type: “pip install -r requirements.txt” after they create their virtual environment in their computer. +

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# Python Virtual Environments + +## Introduction + +Virtual environments in Python are an essential tool for managing and controlling dependencies within a specific project. + +As the name suggests, a virtual environment provides an isolated space where developers can configure all necessary requirements and dependencies for their project. This ensures that these dependencies, including specific versions, are confined to the virtual environment and do not interfere with the global system environment or other projects. + +## Syntax + +### Creating a Virtual Environment +To create a virtual environment, use the following command: +```bash +python -m venv +``` + +### Activating the Virtual Environment +For Unix/MacOS: +```bash +source /bin/activate +``` +For Windows: +```bash +\Scripts\activate +``` + +### Deactivating the Virtual Environment +To deactivate, simply type: +```bash +deactivate +``` + +### Checking Installed Dependencies +To view the installed dependencies within the virtual environment: +```bash +pip freeze +``` + +### Generating a Requirements File +To generate a `requirements.txt` file for sharing the dependencies: +```bash +pip freeze > requirements.txt +``` + +### Installing Dependencies from a Requirements File +To install the dependencies listed in a `requirements.txt` file: +```bash +pip install -r requirements.txt +``` + +## Example + +1. Open your terminal and navigate to your project folder. +2. Create a virtual environment: + ```bash + python -m venv my_env + ``` +3. Activate the virtual environment: + For Unix/MacOS: + ```bash + source my_env/bin/activate + ``` + For Windows: + ```bash + my_env\Scripts\activate + ``` +4. Install a package (e.g., `requests`): + ```bash + pip install requests + ``` +5. Check the installed dependencies: + ```bash + pip freeze + ``` +6. Save the dependencies to a requirements file: + ```bash + pip freeze > requirements.txt + ``` +7. Share the `requirements.txt` file with your colleagues. +8. To replicate the environment on another machine, they can run: + ```bash + pip install -r requirements.txt + ``` +9. When done, deactivate the virtual environment: + ```bash + deactivate