Reports ellipsis literal as syntax error

[David]

Ellipsis is a built-in singleton, also having literal form '...'. For example:

def foo(arg):
    if arg is ...:
        print("yes")
    else:
        print("no")

Pyflakes is reporting it as invalid syntax. It's minor, but the ellipsis is quite convenient when a singleton is needed and None won't work.

[asmeurer (asmeurer)]

Again, this does work correctly, but you need to run pyflakes in Python 3, since ellipsis literals are Python 3-only.