Comment by masklinn

> Does this mean that i can use?

They'll both trigger a runtime error, since the key you're using in the pattern (LHS) does not match any key in the dict.

Note that `'_'` is an actual string, and thus key, it's not any sort of wildcard. Using a bare `_` as key yields a syntax error, I assume because it's too ambiguous for the author to want to support it.