after I install the savanna using the setup.py. I start the savanna by

savanna-api --config-file /etc/savanna/savanna.conf

it seems some wrong.

kylin@node1:~$ savanna-api --config-file /etc/savanna/savanna.conf Traceback (most recent call last): File "/usr/local/bin/savanna-api", line 5, in <module> pkg_resources.run_script('savanna==0.2', 'savanna-api') File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 499, in run_script self.require(requires)[0].run_script(script_name, ns) File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 1235, in run_script execfile(script_filename, namespace, namespace) File "/usr/local/lib/python2.7/dist-packages/savanna-0.2-py2.7.egg/EGG-INFO/scripts/savanna-api", line 35, in <module> import savanna.main as server File "/usr/local/lib/python2.7/dist-packages/savanna-0.2-py2.7.egg/savanna/main.py", line 22, in <module> from savanna.api import v10 as api_v10 File "/usr/local/lib/python2.7/dist-packages/savanna-0.2-py2.7.egg/savanna/api/v10.py", line 18, in <module> from savanna.service import validation as v File "/usr/local/lib/python2.7/dist-packages/savanna-0.2-py2.7.egg/savanna/service/validation.py", line 23, in <module> from savanna.utils import api_validator File "/usr/local/lib/python2.7/dist-packages/savanna-0.2-py2.7.egg/savanna/utils/api_validator.py", line 24, in <module> @jsonschema.FormatChecker.cls_checks('valid_name') AttributeError: 'module' object has no attribute 'FormatChecker'

how should i do ? thanks