Update for strict typing

dockstat.py

@@ -1,7 +1,7 @@
 #!/usr/bin/env python3
 """
 Module to act as a Prometheus Exporter for Docker containers with a
-    healthcheck configured
+healthcheck configured
 """
 
 import argparse
@@ -9,33 +9,30 @@ import os
 import os.path
 import sys
 from http.server import HTTPServer
+from typing import Any
 
-import docker  # type: ignore
+import docker  # type: ignore[import]
 import numpy
-from prometheus_client import (  # type: ignore
+from prometheus_client import CollectorRegistry  # type: ignore[import]
-    CollectorRegistry,
+from prometheus_client import Gauge, MetricsHandler, generate_latest
-    Gauge,
-    MetricsHandler,
-    generate_latest,
-)
 
 LISTEN_PORT = int(os.environ.get('DOCKSTAT_LISTEN_PORT', 8080))
 HEALTHY_STR = 'healthy'
 
 
-class HTTPHandler(MetricsHandler):
+class HTTPHandler(MetricsHandler):  # type: ignore[misc]
     """
     Class to encompass the requirements of a Prometheus Exporter
         for Docker containers with a healthcheck configured
     """
 
-    def __init__(self, *args, **kwargs):
+    def __init__(self, *args: Any, **kwargs: Any):
         self.docker_api: docker.APIClient = docker.APIClient()
         self.docker_client = docker.from_env()
         super().__init__(*args, **kwargs)
 
     # Override built-in method
-    def do_GET(self):
+    def do_GET(self) -> None:
         """
         Handle GET requests
         """
@@ -49,7 +46,7 @@ class HTTPHandler(MetricsHandler):
 
             self._respond(200, 'OK')
 
-    def _respond(self, status: int, message: str):
+    def _respond(self, status: int, message: str) -> None:
         """
         Output a simple HTTP status and string to the client
 
@@ -63,7 +60,7 @@ class HTTPHandler(MetricsHandler):
         self.end_headers()
         self.wfile.write(bytes(str(message).encode()))
 
-    def _metrics(self):
+    def _metrics(self) -> None:
         """
         Handle the request for metrics
         """
@@ -108,13 +105,13 @@ class HTTPHandler(MetricsHandler):
         for container in self.docker_client.containers.list(all=True):
             data = self.docker_api.inspect_container(container.id)
 
-            running: str = bool(data['State']['Running'])
+            running = bool(data['State']['Running'])
-            started_at: int = data['State']['StartedAt']
+            started_at = data['State']['StartedAt']
-            exit_code: int = int(data['State']['ExitCode'])
+            exit_code = int(data['State']['ExitCode'])
             alert_threshold = int(
                 data['Config']['Labels'].get('io.prometheus.alert.downtime', 3600)
             )
-            starttime = numpy.datetime64(started_at, 's').astype('long')
+            starttime: numpy.longlong = numpy.datetime64(started_at, 's').astype('long')
 
             status_gauge.labels(
                 container.id,
@@ -134,7 +131,7 @@ class HTTPHandler(MetricsHandler):
             ).set(alert_threshold)
 
             try:
-                health_str: str = data['State']['Health']['Status']
+                health_str = data['State']['Health']['Status']
                 health_gauge.labels(
                     container.id,
                     container.name,

mypy.ini

@@ -0,0 +1,3 @@
+[mypy]
+plugins = numpy.typing.mypy_plugin
+exclude = ['\.pyenv', 'venv']