In Python, a SyntaxError happens when the interpreter finds code that does not conform to the rules of the Python language.

Scope determines how variables and their names are looked up in code. It defines the area of a program where you can access that name. There are two general scopes.. Global scope: names defined ...

I'm not sure what the rules are in Python, but I do know that generally you can't assign to things at the global scope without invoking global. But at the REPL it does work, presumably because at the ...