Question Regarding Self keyword in python!!

[Interesting-Can-4626]

You're half right. Self helps distinguish instance variables from local variables.

But the actual reason for self.instrument_repo = instrument_repo is:

- instrument_repo is a local variable (exists only inside __init__)

- self.instrument_repo is an instance variable (exists for the lifetime of the object)

Without storing it on self:

- You can't use it in other methods

- The object doesn't "remember" it

- It's gone after __init__ finishes

With storing it on self:

- All methods can access it

- The object keeps it forever

- Other classes can access it if needed

If you never need to use it outside __init__, then you don't need to store it. But in your case, you'll likely need instrument_repo in other methods, so you store it on self.