diff --git a/.github/workflows/pylint.yml b/.github/workflows/pylint.yml
index c73e032..7e0958a 100644
--- a/.github/workflows/pylint.yml
+++ b/.github/workflows/pylint.yml
@@ -18,6 +18,7 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install pylint
+        pip install -r app/requirements.txt
     - name: Analysing the code with pylint
       run: |
         pylint $(git ls-files '*.py')
diff --git a/src/import/article.py b/src/import/article.py
index edf911f..3214f40 100644
--- a/src/import/article.py
+++ b/src/import/article.py
@@ -1,19 +1,24 @@
+"""
+article.py
+Contains Article class used for importing Usenet News articles.
+"""
+
+import email
 import json
 from dateutil import parser
-import email
 
 
-class Article(object):
+class Article:
     """
     Represents a single article.
     """
 
-    def __init__(self, id, folder, path, from_raw, newsgroups, subject, message_id, date, x_gateway, lines, xref,
+    def __init__(self, articleId, folder, path, from_raw, newsgroups, subject, message_id, date, x_gateway, lines, xref,
                  body, references):
         self.from_name = None
         self.from_email = None
         self.date = None
-        self.id = id
+        self.articleId = articleId
         self.location = folder
         self.path = path
         self.newsgroups = newsgroups.split(',')
@@ -73,7 +78,7 @@ def to_dict(self):
         :return:
         """
         return {
-            'id': self.id,
+            'id': self.articleId,
             'path': self.path,
             'folder': self.location,
             'from_name': self.from_name,
@@ -120,9 +125,9 @@ def from_file(path):
 
         pathstr = str(path)
         path_parts = pathstr.split('/')
-        id = '-'.join(path_parts[-3:])
+        article_id = '-'.join(path_parts[-3:])
         return Article(
-            id,
+            article_id,
             '/'.join(path_parts[-3:-1]),
             msg['Path'],
             msg['From'],
diff --git a/src/import/import.py b/src/import/import.py
deleted file mode 100644
index 63f77b6..0000000
--- a/src/import/import.py
+++ /dev/null
@@ -1,2 +0,0 @@
-#!/usr/bin/env python3
-
diff --git a/src/import/test_import.py b/src/import/test_import.py
index 84a5a03..f193027 100755
--- a/src/import/test_import.py
+++ b/src/import/test_import.py
@@ -1,7 +1,13 @@
 #!/usr/bin/env python3
 
+"""
+This is a test import script which imports data from zipped
+Usenet news files.
+"""
+
 from article import Article
 import os
+import sys
 from pathlib import Path
 from elasticsearch import Elasticsearch, helpers
 import tempfile
@@ -20,12 +26,12 @@ def create_mapping(name):
     if client.indices.exists(name):
         client.indices.delete(index=name)
 
-    with open("../service/fields.yaml") as stream:
+    with open("../service/fields.yaml", encoding="utf-8") as stream:
         try:
             data = yaml.safe_load(stream)
         except yaml.YAMLError as e:
             print(e)
-            exit(1)
+            sys.exit(1)
 
     properties = {}
 
diff --git a/src/service/app.py b/src/service/app.py
index 8858a76..0097725 100644
--- a/src/service/app.py
+++ b/src/service/app.py
@@ -1,7 +1,7 @@
-from flask import Flask, request, jsonify
-from flask_cors import CORS
 import os
 from elastic_index import Index
+from flask import Flask, request, jsonify
+from flask_cors import CORS
 import yaml
 
 app = Flask(__name__, static_folder="browser", static_url_path="")
@@ -28,16 +28,28 @@ def after_request(response):
 @app.route("/", methods=["GET", "POST"])
 @app.route("/search")
 def catch_all():
+    """
+    Return the front-end, pages are handled by React
+    :return:
+    """
     return app.send_static_file("index.html")
 
 
-@app.route("/api/detail/<id>")
+@app.route("/detail/<id>")
 def detail(id):
+    """
+    Return the front-end, pages are handled by React
+    :return:
+    """
     return app.send_static_file("index.html")
 
 
 @app.route("/api/facets", methods=["GET"])
 def get_facets():
+    """
+    Get all used facets, and their configuration.
+    :return:
+    """
     try:
         data = index.get_facets()
     except yaml.YAMLError as e:
@@ -49,6 +61,10 @@ def get_facets():
 
 @app.route("/api/facet", methods=["POST", "GET"])
 def get_facet():
+    """
+    Get facet information.
+    :return:
+    """
     struc = request.get_json()
     ret_struc = index.get_facet(struc["name"], struc["amount"], struc["filter"], struc["searchvalues"])
     return jsonify(ret_struc)
@@ -56,6 +72,10 @@ def get_facet():
 
 @app.route("/api/browse", methods=["POST", "GET"])
 def browse():
+    """
+    Search for articles using elasticsearch.
+    :return:
+    """
     struc = request.get_json()
     ret_struc = index.browse(struc["page"], struc["page_length"], struc["searchvalues"])
     return jsonify(ret_struc)
@@ -63,5 +83,9 @@ def browse():
 
 @app.route("/api/article", methods=["GET"])
 def get_article():
-    id = request.args.get("rec")
-    return jsonify(index.by_id(id))
+    """
+    Get details of a single article.
+    :return:
+    """
+    article_id = request.args.get("rec")
+    return jsonify(index.by_id(article_id))