diff --git a/nsupdate/api/views.py b/nsupdate/api/views.py
index a912ca3..a2818c0 100644
--- a/nsupdate/api/views.py
+++ b/nsupdate/api/views.py
@@ -17,10 +17,26 @@ from main.dnstools import update, SameIpError
 
 
 def MyIpView(request):
+    """
+    return the IP address (can be v4 or v6) of the client requesting this view.
+
+    :param request: django request object
+    :return: HttpResponse object
+    """
     return HttpResponse(request.META['REMOTE_ADDR'], content_type="text/plain")
 
 
 def DetectIpView(request, secret=None):
+    """
+    Put the IP address (can be v4 or v6) of the client requesting this view
+    into the client's session.
+
+    :param request: django request object
+    :return: HttpResponse object
+    """
+    # we do not have the session as usual, as this is a different host,
+    # so the session cookie is not received here - thus we access it via
+    # the secret:
     s = SessionStore(session_key=secret)
     ipaddr = request.META['REMOTE_ADDR']
     af = dns.inet.af_for_address(ipaddr)
@@ -100,6 +116,7 @@ def check_session_auth(user, hostname):
 
 
 def Response(content):
+    """shortcut for plaintext response"""
     return HttpResponse(content, content_type='text/plain')
 
 
@@ -121,6 +138,9 @@ def NicUpdateView(request):
     a query parameter, you can also give the hostname (then it won't use
     the username from http basic auth as the fqdn:
     https://fqdn:secret@nsupdate.info/nic/update?hostname=fqdn&myip=1.2.3.4
+
+    :param request: django request object
+    :return: HttpResponse object
     """
     hostname = request.GET.get('hostname')
     auth = request.META.get('HTTP_AUTHORIZATION')
@@ -153,6 +173,9 @@ def AuthorizedNicUpdateView(request):
     Example URLs:
 
     https://supdate.info/nic/update?hostname=fqdn&myip=1.2.3.4
+
+    :param request: django request object
+    :return: HttpResponse object
     """
     hostname = request.GET.get('hostname')
     if hostname is None:
diff --git a/nsupdate/nsupdate/settings.py b/nsupdate/nsupdate/settings.py
index 5b70c22..ac7b30f 100644
--- a/nsupdate/nsupdate/settings.py
+++ b/nsupdate/nsupdate/settings.py
@@ -1,4 +1,7 @@
-# Django settings for nsupdate project.
+"""
+Django settings for nsupdate project
+"""
+
 import django.conf.global_settings as DEFAULT_SETTINGS
 import dns.tsig
 import os
diff --git a/setup.py b/setup.py
index 92add87..f84787d 100644
--- a/setup.py
+++ b/setup.py
@@ -1,3 +1,7 @@
+"""
+setup for nsupdate package
+"""
+
 from setuptools import setup, find_packages
 
 with open('README.rst') as f: