Update hacking for Python3

The repo is Python 3 now, so update hacking to version 3.0 which
supports Python 3.

Fix problems found by updated hacking version.

Remove hacking and friends from lower-constraints, they are not needed
there.

Change-Id: I7614df314c211dc3acca2e3e8cb647bddddd6c16

devstack/files/grafana/grafana.py

@@ -59,6 +59,7 @@ def retry(retries=5, delay=2.0, exc_types=(RequestException,)):
         return f_retry
     return decorator
 
+
 def create_login_payload():
     if os.environ.get('GRAFANA_USERS'):
         try:
@@ -71,6 +72,7 @@ def create_login_payload():
         grafana_users = GRAFANA_USERS
     return grafana_users
 
+
 @retry(retries=24, delay=5.0)
 def login(session, user):
     r = session.post('{url}/login'.format(url=GRAFANA_URL),
@@ -78,6 +80,7 @@ def login(session, user):
                      timeout=5)
     r.raise_for_status()
 
+
 def create_dashboard_payload(json_path):
     with open(json_path, 'r') as f:
         dashboard = json.load(f)
@@ -88,6 +91,7 @@ def create_dashboard_payload(json_path):
             'overwrite': True
         }
 
+
 def main():
     for user in create_login_payload():
         logging.info('Opening a Grafana session...')

docker/health_check.py

@@ -18,9 +18,9 @@
 """Health check will returns 0 when service is working properly."""
 
 import logging
-from urllib import request
 import os
 import sys
+from urllib import request
 
 
 LOG_LEVEL = logging.getLevelName(os.environ.get('LOG_LEVEL', 'INFO'))

lower-constraints.txt

@@ -14,13 +14,11 @@ eventlet==0.18.2
 extras==1.0.0
 falcon==2.0.0
 fixtures==3.0.0
-flake8==2.5.5
 future==0.16.0
 gevent==1.2.2
 gitdb==0.6.4
 GitPython==1.0.1
 greenlet==0.4.10
-hacking==0.12.0
 imagesize==0.7.1
 iso8601==0.1.11
 Jinja2==2.10
@@ -54,7 +52,6 @@ oslotest==3.2.0
 Paste==2.0.2
 PasteDeploy==1.5.0
 pbr==2.0.0
-pep8==1.5.7
 positional==1.2.1
 pycadf==1.1.0
 pyflakes==0.8.1

monasca_log_api/tests/base.py

@@ -55,6 +55,7 @@ def _hex_to_unicode(hex_raw):
     hex_str = hex_str_raw.decode('utf-8', 'replace')
     return hex_str
 
+
 # NOTE(trebskit) => http://www.cl.cam.ac.uk/~mgk25/ucs/examples/UTF-8-test.txt
 UNICODE_MESSAGES = [
     # Unicode is evil...

test-requirements.txt

@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 
 # Install bounded pep8/pyflakes first, then let flake8 install
-hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
+hacking>=3.0,<3.1.0 # Apache-2.0
 bandit!=1.6.0,>=1.1.0 # Apache-2.0
 bashate>=0.5.1 # Apache-2.0