See: https://bugs.launchpad.net/pyflakes/+bug/989203
NB: Whilst this bug report indicates some level of resolution, testing the latest version of pyflakes 0.8.1
this lack of Python 3 Annotations still exists.
I guess you'd have to file a separate new feature request to pyflakes.
$ cat - > foo.py
def add(x:int, y:int) -> int:
return x + y
^D
$ pyflakes --version
0.8.1
$ pyflakes foo.py
foo.py:1:10: invalid syntax
def add(x:int, y:int) -> int:
^
UPDATE (20140514):
As it turns out the actual answer to this problem is to run pyflakes
or flake8
under Python 3.x instead of Python 2.x. It makes sense :)
So do something like this:
/usr/bin/python3 -m pyflakes foo.py