sudo python setup.py install fails

[WolfgangFahl]

e.g. File "/usr/local/lib/python2.7/dist-packages/tornado-6.0.2-py2.7-linux-armv7l.egg/tornado/test/queues_test.py", line 166
async def f():
^
SyntaxError: invalid syntax

[WolfgangFahl]

install_requires = ["tornado>=2.2"]

should limit the version see https://www.tornadoweb.org/en/stable/releases.html for which versions still suport Python 2.x

[WolfgangFahl]

Workaround for me is
install_requires = ["tornado==3.1"]