Create a Python virtual environment:

```
python3 -m venv pgadmin4
```

Navigate to the new directory and create some necessary folders:

```
cd ~/pgadmin4mkdir varmkdir var/storagemkdir var/sessions
```

Activate the virtual environment:

```
source ~/pgadmin4/bin/activate
```

Install the Python _pgadmin4_ package:

```
pip install pgadmin4
```

This is an official package available in PyPi, maintained by the pgAdmin Development Team, that allows us to run pgAdmin as a **Flask** web application.