Python manager (pip).

renovate.json

@@ -1,5 +1,16 @@
 {
   "$schema": "https://docs.renovatebot.com/renovate-schema.json",
   "extends": ["local>trez/renovate-config"],
-  "enabledManagers": ["pip_requirements"]
+  "enabledManagers": [
+    "pip_requirements"
+  ],
+  "pip_requirements": {
+    "fileMatch": ["(^|/)requirements\\.txt$"]
+  },
+  "packageRules": [
+    {
+      "matchManagers": ["pip_requirements"],
+      "groupName": "Python dependencies"
+    }
+  ]
 }