The traditional ways to do this in Python aren’t elegant. One is to write an if/elif/else chain of expressions. The other is to store values to match as keys in a dictionary, then use the values ...

return 0 elif val == 1 or val == 2: return 1 else: return self._calc(val-1)+self._calc(val-2) On an AMD Ryzen 5 3600, this code executes in about 20 seconds. Python is inefficient when it comes to ...