Have you ever faced tasks where you were asked to improve or modify without a complete source code?

Yes, such a situation has occurred. When tasked with refining a problem without the full source code, it is usually necessary to:

• Analyze available parts of the code and documentation.
• Use tools for decompilation or bytecode viewing (if possible).
• Perform refactoring and add logging to understand the system's behavior.
• Consult colleagues or the client for additional information.

In Python, interactive mode and debuggers (such as pdb) often help to explore objects and their state during execution.

Such experience develops skills in reading and understanding someone else's code, as well as the ability to work with incomplete information.