What were you doing before 2020?

This question relates to personal experience, so the answer depends on the individual. In the context of Python, one can talk about previous work experience with the language or related technologies before 2020.

For example, you might mention:

• Developing scripts for task automation
• Participating in data analysis projects using pandas, numpy libraries
• Creating web applications with Django or Flask
• Experience with version control systems and CI/CD

In general, it's important to highlight how previous experience helped develop programming skills and understanding of the Python ecosystem.