trouble running tox with flake8

[Trophime]

Hi, I'm having trouble running flake8 on a plugin:

Collecting https://github.com/cloudify-cosmo/cloudify-dsl-parser/archive/4.3.1.zip (from -r dev-requirements.txt (line 1))
  Downloading https://github.com/cloudify-cosmo/cloudify-dsl-parser/archive/4.3.1.zip (179kB)
    Complete output from command python setup.py egg_info:
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-req-build-ord0zbwh/setup.py", line 29
        except ImportError, e:
                          ^
    SyntaxError: invalid syntax
    
    ----------------------------------------
Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-req-build-ord0zbwh/

if this line correct in setup.py:

except ImportError, e: