How do I debug collection errors in Python?

I'm getting a collection error in my Python code. How do I debug it?

Collection errors often occur when you're trying to access elements in a list or dictionary that don't exist. Can you share the specific error message?

The error says 'KeyError: 'my_key'' when I try to access a dictionary.

A KeyError means that the key you're trying to access isn't present in the dictionary. You can use the get() method to avoid this error. Would you like an example?

Yes, please! That would be helpful.

Sure! Instead of my_dict['my_key'], use my_dict.get('my_key', 'default_value'). This way, if 'my_key' doesn't exist, it will return 'default_value' instead of raising an error.