module: add formatting and linting configuration

- apply formatting

.pylintrc

@@ -0,0 +1,5 @@
+[FORMAT]
+max-line-length=121
+
+[MESSAGES CONTROL]
+disable=invalid-name,missing-module-docstring,missing-function-docstring

.style.yapf

@@ -0,0 +1,3 @@
+[style]
+based_on_style = pep8
+column_limit = 120

kube-stale-resources.py

@@ -4,10 +4,11 @@ import argparse
 import re
 import sys
 
+from typing import (List, Tuple, IO)
+
 import requests
 import yaml
 
-from typing import (List, Any, Dict, Tuple, IO)
 K8sResourceIdentifier = Tuple[str, str, str, str]
 
 HEADERS = {"Content-Type": "application/json"}
@@ -98,7 +99,7 @@ def get_compact_resource_identifiers(tuples: List[K8sResourceIdentifier]) -> Lis
     return [namespace + ':' + apiVersion + ':' + kind + ':' + name for namespace, apiVersion, kind, name in tuples]
 
 
-if __name__ == "__main__":
+def main():
     parser = argparse.ArgumentParser(description='Utility to detect k8s configuration drift.')
 
     parser.add_argument('-f',
@@ -121,7 +122,7 @@ if __name__ == "__main__":
     if args.blacklist_file:
         print(f'Reading blacklist file {args.blacklist_file}...')
         with open(args.blacklist_file, 'r') as f:
-            blacklist_regexs += filter(lambda x: not re.match(r'^\s*$', x), f.read().split('\n'))
+            blacklist_regexs += list(filter(lambda x: not re.match(r'^\s*$', x), f.read().split('\n')))
 
     print('Retrieving target state...')
     if args.target_manifests_file == '-':
@@ -154,3 +155,7 @@ if __name__ == "__main__":
             counter += 1
             print('  ' + x)
     print("..", counter, "entries")
+
+
+if __name__ == "__main__":
+    main()