make flake8 happy

Author: pietroalbini

homu/main.py

@@ -1245,7 +1245,7 @@ def start_build(state, repo_cfgs, buildbot_slots, logger, db, git_cfg):
         builders += ['checks-' + key for key, value in repo_cfg['checks'].items() if 'name' in value]  # noqa
         only_status_builders = False
 
-    if len(builders) is 0:
+    if len(builders) == 0:
         raise RuntimeError('Invalid configuration')
 
     lazy_debug(logger, lambda: "start_build: builders={!r}".format(builders))
@@ -1699,7 +1699,7 @@ def main():
                     builders += ['status-' + key for key, value in repo_cfg['status'].items() if 'context' in value]  # noqa
                 if 'checks' in repo_cfg:
                     builders += ['checks-' + key for key, value in repo_cfg['checks'].items() if 'name' in value]  # noqa
-                if len(builders) is 0:
+                if len(builders) == 0:
                     raise RuntimeError('Invalid configuration')
 
                 state.init_build_res(builders, use_db=False)

homu/server.py

@@ -505,7 +505,7 @@ def fail(err):
             for name, value in repo_cfg['status'].items():
                 if 'context' in value and value['context'] == info['context']:
                     status_name = name
-        if status_name is "":
+        if status_name == "":
             return 'OK'
 
         if info['state'] == 'pending':