Python function that takes one compulsory argument from two choices

Question

I have a function:

def delete(title=None, pageid=None):
    # Deletes the page given, either by its title or ID
    ...
    pass

However, m

Answer 1

There is no Python syntax that'll let you define exclusive-or arguments, no. You'd have to explicitly raise an exception is both or none are specified:

if (title and pageid) or not (title or pageid):
    raise ValueError('Can only delete by title OR pageid')