Question

On this code:

def plot(div_name = "", series , options = {} )

I’m getting a syntax error:

unexpected '=', expecting ')' (SyntaxError).

Why is that?
Assigning a default value to series solves the problem.

Answer 1

You’re not allowed to have optional arguments followed by non-optional arguments followed by further optional arguments. If that were allowed, it would be ambiguous whether plot(foo, bar) should be plot(foo, bar, {}) or plot("", foo, bar).