diff --git a/InvenTree/build/api.py b/InvenTree/build/api.py
index c9e756839f..fedfe53008 100644
--- a/InvenTree/build/api.py
+++ b/InvenTree/build/api.py
@@ -17,8 +17,6 @@ from .serializers import BuildSerializer
 
 class BuildList(generics.ListCreateAPIView):
     """ API endpoint for accessing a list of Build objects.
-
-    Provides two methods:
     
     - GET: Return list of objects (with filters)
     - POST: Create a new Build object
diff --git a/InvenTree/build/serializers.py b/InvenTree/build/serializers.py
index 92534ef816..955a8d59f5 100644
--- a/InvenTree/build/serializers.py
+++ b/InvenTree/build/serializers.py
@@ -1,5 +1,5 @@
 """
-Provides JSON serializers for Build API
+JSON serializers for Build API
 """
 
 # -*- coding: utf-8 -*-
diff --git a/InvenTree/build/views.py b/InvenTree/build/views.py
index 756566e694..c8d40e80e6 100644
--- a/InvenTree/build/views.py
+++ b/InvenTree/build/views.py
@@ -1,5 +1,5 @@
 """
-Provides Django views for interacting with Build objects
+Django views for interacting with Build objects
 """
 
 # -*- coding: utf-8 -*-
diff --git a/InvenTree/company/serializers.py b/InvenTree/company/serializers.py
index a87560a873..e9a24e0d2a 100644
--- a/InvenTree/company/serializers.py
+++ b/InvenTree/company/serializers.py
@@ -1,9 +1,14 @@
+""" 
+JSON serializers for Company app
+"""
+
 from rest_framework import serializers
 
 from .models import Company
 
 
 class CompanyBriefSerializer(serializers.ModelSerializer):
+    """ Serializer for Company object (limited detail) """
 
     url = serializers.CharField(source='get_absolute_url', read_only=True)
 
@@ -17,6 +22,7 @@ class CompanyBriefSerializer(serializers.ModelSerializer):
 
 
 class CompanySerializer(serializers.ModelSerializer):
+    """ Serializer for Company object (full detail) """
 
     url = serializers.CharField(source='get_absolute_url', read_only=True)
 
diff --git a/InvenTree/company/views.py b/InvenTree/company/views.py
index 5a80e5ea15..b171d83f86 100644
--- a/InvenTree/company/views.py
+++ b/InvenTree/company/views.py
@@ -1,3 +1,8 @@
+"""
+Django views for interacting with Company app
+"""
+
+
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
@@ -12,12 +17,20 @@ from .forms import CompanyImageForm
 
 
 class CompanyIndex(ListView):
+    """ View for displaying list of companies 
+    """
+
     model = Company
     template_name = 'company/index.html'
     context_object_name = 'companies'
     paginate_by = 50
 
     def get_queryset(self):
+        """ Retrieve the Company queryset based on HTTP request parameters.
+
+        - supplier: Filter by supplier
+        - customer: Filter by customer
+        """
         queryset = Company.objects.all().order_by('name')
 
         if self.request.GET.get('supplier', None):
@@ -30,6 +43,7 @@ class CompanyIndex(ListView):
 
 
 class CompanyDetail(DetailView):
+    """ Detail view for Company object """
     context_obect_name = 'company'
     template_name = 'company/detail.html'
     queryset = Company.objects.all()
@@ -37,6 +51,7 @@ class CompanyDetail(DetailView):
 
 
 class CompanyImage(AjaxUpdateView):
+    """ View for uploading an image for the Company """
     model = Company
     ajax_template_name = 'modal_form.html'
     ajax_form_title = 'Update Company Image'
@@ -49,6 +64,7 @@ class CompanyImage(AjaxUpdateView):
 
 
 class CompanyEdit(AjaxUpdateView):
+    """ View for editing a Company object """
     model = Company
     form_class = EditCompanyForm
     context_object_name = 'company'
@@ -62,6 +78,7 @@ class CompanyEdit(AjaxUpdateView):
 
 
 class CompanyCreate(AjaxCreateView):
+    """ View for creating a new Company object """
     model = Company
     context_object_name = 'company'
     form_class = EditCompanyForm
@@ -75,6 +92,7 @@ class CompanyCreate(AjaxCreateView):
 
 
 class CompanyDelete(AjaxDeleteView):
+    """ View for deleting a Company object """
     model = Company
     success_url = '/company/'
     ajax_template_name = 'company/delete.html'
diff --git a/InvenTree/part/api.py b/InvenTree/part/api.py
index 9b5aef436a..d9ee5e5566 100644
--- a/InvenTree/part/api.py
+++ b/InvenTree/part/api.py
@@ -1,3 +1,7 @@
+"""
+Provides a JSON API for the Part app
+"""
+
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
@@ -26,6 +30,12 @@ class PartCategoryTree(TreeSerializer):
 
 
 class CategoryList(generics.ListCreateAPIView):
+    """ API endpoint for accessing a list of PartCategory objects.
+
+    - GET: Return a list of PartCategory objects
+    - POST: Create a new PartCategory object
+    """
+
     queryset = PartCategory.objects.all()
     serializer_class = CategorySerializer
 
@@ -56,11 +66,13 @@ class CategoryList(generics.ListCreateAPIView):
 
 
 class CategoryDetail(generics.RetrieveUpdateDestroyAPIView):
+    """ API endpoint for detail view of a single PartCategory object """
     serializer_class = CategorySerializer
     queryset = PartCategory.objects.all()
 
 
 class PartDetail(generics.RetrieveUpdateDestroyAPIView):
+    """ API endpoint for detail view of a single Part object """
     queryset = Part.objects.all()
     serializer_class = PartSerializer
 
@@ -70,6 +82,11 @@ class PartDetail(generics.RetrieveUpdateDestroyAPIView):
 
 
 class PartList(generics.ListCreateAPIView):
+    """ API endpoint for accessing a list of Part objects
+
+    - GET: Return list of objects
+    - POST: Create a new Part object
+    """
 
     serializer_class = PartSerializer
 
@@ -130,6 +147,11 @@ class PartList(generics.ListCreateAPIView):
 
 
 class BomList(generics.ListCreateAPIView):
+    """ API endpoing for accessing a list of BomItem objects
+
+    - GET: Return list of BomItem objects
+    - POST: Create a new BomItem object
+    """
 
     queryset = BomItem.objects.all()
     serializer_class = BomItemSerializer
@@ -151,6 +173,7 @@ class BomList(generics.ListCreateAPIView):
 
 
 class BomDetail(generics.RetrieveUpdateDestroyAPIView):
+    """ API endpoint for detail view of a single BomItem object """
 
     queryset = BomItem.objects.all()
     serializer_class = BomItemSerializer
@@ -161,6 +184,11 @@ class BomDetail(generics.RetrieveUpdateDestroyAPIView):
 
 
 class SupplierPartList(generics.ListCreateAPIView):
+    """ API endpoint for list view of SupplierPart object
+
+    - GET: Return list of SupplierPart objects
+    - POST: Create a new SupplierPart object
+    """
 
     queryset = SupplierPart.objects.all()
     serializer_class = SupplierPartSerializer
@@ -182,6 +210,12 @@ class SupplierPartList(generics.ListCreateAPIView):
 
 
 class SupplierPartDetail(generics.RetrieveUpdateDestroyAPIView):
+    """ API endpoint for detail view of SupplierPart object
+
+    - GET: Retrieve detail view
+    - PATCH: Update object
+    - DELETE: Delete objec
+    """
 
     queryset = SupplierPart.objects.all()
     serializer_class = SupplierPartSerializer
@@ -192,6 +226,11 @@ class SupplierPartDetail(generics.RetrieveUpdateDestroyAPIView):
 
 
 class SupplierPriceBreakList(generics.ListCreateAPIView):
+    """ API endpoint for list view of SupplierPriceBreak object 
+
+    - GET: Retrieve list of SupplierPriceBreak objects
+    - POST: Create a new SupplierPriceBreak object
+    """
 
     queryset = SupplierPriceBreak.objects.all()
     serializer_class = SupplierPriceBreakSerializer
diff --git a/InvenTree/part/forms.py b/InvenTree/part/forms.py
index 4d7d05bba1..040444093d 100644
--- a/InvenTree/part/forms.py
+++ b/InvenTree/part/forms.py
@@ -1,3 +1,7 @@
+"""
+Django Forms for interacting with Part objects
+"""
+
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
@@ -10,6 +14,7 @@ from .models import SupplierPart
 
 
 class PartImageForm(HelperForm):
+    """ Form for uploading a Part image """
 
     class Meta:
         model = Part
@@ -40,6 +45,7 @@ class BomExportForm(HelperForm):
 
 
 class EditPartForm(HelperForm):
+    """ Form for editing a Part object """
 
     class Meta:
         model = Part
@@ -64,6 +70,7 @@ class EditPartForm(HelperForm):
 
 
 class EditCategoryForm(HelperForm):
+    """ Form for editing a PartCategory object """
 
     class Meta:
         model = PartCategory
@@ -75,6 +82,7 @@ class EditCategoryForm(HelperForm):
 
 
 class EditBomItemForm(HelperForm):
+    """ Form for editing a BomItem object """
 
     class Meta:
         model = BomItem
@@ -88,6 +96,7 @@ class EditBomItemForm(HelperForm):
 
 
 class EditSupplierPartForm(HelperForm):
+    """ Form for editing a SupplierPart object """
 
     class Meta:
         model = SupplierPart
diff --git a/InvenTree/part/models.py b/InvenTree/part/models.py
index dd30178f39..4022b7ec71 100644
--- a/InvenTree/part/models.py
+++ b/InvenTree/part/models.py
@@ -1,3 +1,7 @@
+"""
+Part database model definitions
+"""
+
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
@@ -47,11 +51,19 @@ class PartCategory(InvenTreeTree):
 
     @property
     def has_parts(self):
+        """ True if there are any parts in this category """
         return self.parts.count() > 0
 
 
 @receiver(pre_delete, sender=PartCategory, dispatch_uid='partcategory_delete_log')
 def before_delete_part_category(sender, instance, using, **kwargs):
+    """ Receives before_delete signal for PartCategory object
+
+    Before deleting, update child Part and PartCategory objects:
+
+    - For each child category, set the parent to the parent of *this* category
+    - For each part, set the 'category' to the parent of *this* category
+    """
 
     # Update each part in this category to point to the parent category
     for part in instance.parts.all():
@@ -67,6 +79,16 @@ def before_delete_part_category(sender, instance, using, **kwargs):
 # Function to automatically rename a part image on upload
 # Format: part_pk.<img>
 def rename_part_image(instance, filename):
+    """ Function for renaming a part image file
+
+    Args:
+        instance: Instance of a Part object
+        filename: Name of original uploaded file
+
+    Returns:
+        Cleaned filename in format part_<n>_img
+    """
+
     base = 'part_images'
 
     if filename.count('.') > 0:
@@ -248,7 +270,8 @@ class Part(models.Model):
 
     @property
     def allocation_count(self):
-        """ Return true if any of this part is allocated
+        """ Return true if any of this part is allocated:
+
         - To another build
         - To a customer order
         """
@@ -311,6 +334,15 @@ class Part(models.Model):
 
 
 def attach_file(instance, filename):
+    """ Function for storing a file for a PartAttachment
+
+    Args:
+        instance: Instance of a PartAttachment object
+        filename: name of uploaded file
+
+    Returns:
+        path to store file, format: 'part_file_<pk>_filename'
+    """
     # Construct a path to store a file attachment
     return os.path.join('part_files', str(instance.part.id), filename)
 
@@ -356,6 +388,13 @@ class BomItem(models.Model):
     note = models.CharField(max_length=100, blank=True, help_text='Item notes')
 
     def clean(self):
+        """ Check validity of the BomItem model.
+
+        Performs model checks beyond simple field validation.
+
+        - A part cannot refer to itself in its BOM
+        - A part cannot refer to a part which refers to it
+        """
 
         # A part cannot refer to itself in its BOM
         if self.part == self.sub_part:
@@ -382,8 +421,9 @@ class BomItem(models.Model):
 class SupplierPart(models.Model):
     """ Represents a unique part as provided by a Supplier
     Each SupplierPart is identified by a MPN (Manufacturer Part Number)
-    Each SupplierPart is also linked to a Part object
-    - A Part may be available from multiple suppliers
+    Each SupplierPart is also linked to a Part object.
+
+    A Part may be available from multiple suppliers
     """
 
     def get_absolute_url(self):
@@ -453,6 +493,7 @@ class SupplierPart(models.Model):
 
     def get_price(self, quantity, moq=True, multiples=True):
         """ Calculate the supplier price based on quantity price breaks.
+        
         - If no price breaks available, use the single_price field
         - Don't forget to add in flat-fee cost (base_cost field)
         - If MOQ (minimum order quantity) is required, bump quantity
diff --git a/InvenTree/part/serializers.py b/InvenTree/part/serializers.py
index 68066645bd..0344e46fe7 100644
--- a/InvenTree/part/serializers.py
+++ b/InvenTree/part/serializers.py
@@ -1,3 +1,7 @@
+"""
+JSON serializers for Part app
+"""
+
 from rest_framework import serializers
 
 from .models import Part, PartCategory, BomItem
@@ -7,6 +11,7 @@ from InvenTree.serializers import InvenTreeModelSerializer
 
 
 class CategorySerializer(serializers.ModelSerializer):
+    """ Serializer for PartCategory """
 
     url = serializers.CharField(source='get_absolute_url', read_only=True)
 
@@ -23,6 +28,7 @@ class CategorySerializer(serializers.ModelSerializer):
 
 
 class PartBriefSerializer(serializers.ModelSerializer):
+    """ Serializer for Part (brief detail) """
 
     url = serializers.CharField(source='get_absolute_url', read_only=True)
 
@@ -68,6 +74,7 @@ class PartSerializer(serializers.ModelSerializer):
 
 
 class BomItemSerializer(InvenTreeModelSerializer):
+    """ Serializer for BomItem object """
 
     # url = serializers.CharField(source='get_absolute_url', read_only=True)
 
@@ -89,6 +96,7 @@ class BomItemSerializer(InvenTreeModelSerializer):
 
 
 class SupplierPartSerializer(serializers.ModelSerializer):
+    """ Serializer for SupplierPart object """
 
     url = serializers.CharField(source='get_absolute_url', read_only=True)
 
@@ -112,6 +120,7 @@ class SupplierPartSerializer(serializers.ModelSerializer):
 
 
 class SupplierPriceBreakSerializer(serializers.ModelSerializer):
+    """ Serializer for SupplierPriceBreak object """
 
     class Meta:
         model = SupplierPriceBreak
diff --git a/InvenTree/part/urls.py b/InvenTree/part/urls.py
index 14a15625f9..96c830f556 100644
--- a/InvenTree/part/urls.py
+++ b/InvenTree/part/urls.py
@@ -1,3 +1,7 @@
+"""
+URL lookup for Part app
+"""
+
 from django.conf.urls import url, include
 
 from . import views
diff --git a/InvenTree/part/views.py b/InvenTree/part/views.py
index 4f7175301a..db9f66994c 100644
--- a/InvenTree/part/views.py
+++ b/InvenTree/part/views.py
@@ -1,3 +1,7 @@
+"""
+Django views for interacting with Part app
+"""
+
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
@@ -21,10 +25,12 @@ from .forms import EditSupplierPartForm
 
 from InvenTree.views import AjaxView, AjaxCreateView, AjaxUpdateView, AjaxDeleteView
 
-from InvenTree.helpers import DownloadFile
+from InvenTree.helpers import DownloadFile, str2bool
 
 
 class PartIndex(ListView):
+    """ View for displaying list of Part objects
+    """
     model = Part
     template_name = 'part/category.html'
     context_object_name = 'parts'
@@ -45,8 +51,12 @@ class PartIndex(ListView):
 
 
 class PartCreate(AjaxCreateView):
-    """ Create a new part
-    - Optionally provide a category object as initial data
+    """ View for creating a new Part object.
+
+    Options for providing initial conditions:
+    
+    - Provide a category object as initial data
+    - Copy an existing Part
     """
     model = Part
     form_class = EditPartForm
@@ -64,6 +74,10 @@ class PartCreate(AjaxCreateView):
 
     # If a category is provided in the URL, pass that to the page context
     def get_context_data(self, **kwargs):
+        """ Provide extra context information for the form to display:
+
+        - Add category information (if provided)
+        """
         context = super(PartCreate, self).get_context_data(**kwargs)
 
         # Add category information to the page
@@ -76,6 +90,11 @@ class PartCreate(AjaxCreateView):
 
     # Pre-fill the category field if a valid category is provided
     def get_initial(self):
+        """ Get initial data for the new Part object:
+
+        - If a category is provided, pre-fill the Category field
+        - If 'copy' parameter is provided, copy from referenced Part
+        """
 
         # Is the client attempting to copy an existing part?
         part_to_copy = self.request.GET.get('copy', None)
@@ -98,15 +117,22 @@ class PartCreate(AjaxCreateView):
 
 
 class PartDetail(DetailView):
+    """ Detail view for Part object
+    """
+
     context_object_name = 'part'
     queryset = Part.objects.all()
     template_name = 'part/detail.html'
 
     # Add in some extra context information based on query params
     def get_context_data(self, **kwargs):
+        """ Provide extra context data to template
+
+        - If '?editing=True', set 'editing_enabled' context variable
+        """
         context = super(PartDetail, self).get_context_data(**kwargs)
 
-        if self.request.GET.get('edit', '').lower() in ['true', 'yes', '1']:
+        if str2bool(self.request.GET.get('edit', '')):
             context['editing_enabled'] = 1
         else:
             context['editing_enabled'] = 0
@@ -115,6 +141,7 @@ class PartDetail(DetailView):
 
 
 class PartImage(AjaxUpdateView):
+    """ View for uploading Part image """
 
     model = Part
     ajax_template_name = 'modal_form.html'
@@ -128,6 +155,8 @@ class PartImage(AjaxUpdateView):
 
 
 class PartEdit(AjaxUpdateView):
+    """ View for editing Part object """
+
     model = Part
     template_name = 'part/edit.html'
     form_class = EditPartForm
@@ -214,6 +243,8 @@ class BomDownload(AjaxView):
 
 
 class PartDelete(AjaxDeleteView):
+    """ View to delete a Part object """
+
     model = Part
     template_name = 'part/delete.html'
     ajax_template_name = 'part/partial_delete.html'
@@ -229,6 +260,7 @@ class PartDelete(AjaxDeleteView):
 
 
 class CategoryDetail(DetailView):
+    """ Detail view for PartCategory """
     model = PartCategory
     context_object_name = 'category'
     queryset = PartCategory.objects.all()
@@ -236,6 +268,7 @@ class CategoryDetail(DetailView):
 
 
 class CategoryEdit(AjaxUpdateView):
+    """ Update view to edit a PartCategory """
     model = PartCategory
     template_name = 'part/category_edit.html'
     form_class = EditCategoryForm
@@ -251,6 +284,7 @@ class CategoryEdit(AjaxUpdateView):
 
 
 class CategoryDelete(AjaxDeleteView):
+    """ Delete view to delete a PartCategory """
     model = PartCategory
     template_name = 'part/category_delete.html'
     context_object_name = 'category'
@@ -263,6 +297,7 @@ class CategoryDelete(AjaxDeleteView):
 
 
 class CategoryCreate(AjaxCreateView):
+    """ Create view to make a new PartCategory """
     model = PartCategory
     ajax_form_action = reverse_lazy('category-create')
     ajax_form_title = 'Create new part category'
@@ -271,6 +306,10 @@ class CategoryCreate(AjaxCreateView):
     form_class = EditCategoryForm
 
     def get_context_data(self, **kwargs):
+        """ Add extra context data to template.
+
+        - If parent category provided, pass the category details to the template
+        """
         context = super(CategoryCreate, self).get_context_data(**kwargs).copy()
 
         parent_id = self.request.GET.get('category', None)
@@ -281,6 +320,10 @@ class CategoryCreate(AjaxCreateView):
         return context
 
     def get_initial(self):
+        """ Get initial data for new PartCategory
+
+        - If parent provided, pre-fill the parent category
+        """
         initials = super(CategoryCreate, self).get_initial().copy()
 
         parent_id = self.request.GET.get('category', None)
@@ -292,12 +335,14 @@ class CategoryCreate(AjaxCreateView):
 
 
 class BomItemDetail(DetailView):
+    """ Detail view for BomItem """
     context_object_name = 'item'
     queryset = BomItem.objects.all()
     template_name = 'part/bom-detail.html'
 
 
 class BomItemCreate(AjaxCreateView):
+    """ Create view for making a new BomItem object """
     model = BomItem
     form_class = EditBomItemForm
     template_name = 'part/bom-create.html'
@@ -305,6 +350,11 @@ class BomItemCreate(AjaxCreateView):
     ajax_form_title = 'Create BOM item'
 
     def get_initial(self):
+        """ Provide initial data for the BomItem:
+
+        - If 'parent' provided, set the parent part field
+        """
+
         # Look for initial values
         initials = super(BomItemCreate, self).get_initial().copy()
 
@@ -318,6 +368,8 @@ class BomItemCreate(AjaxCreateView):
 
 
 class BomItemEdit(AjaxUpdateView):
+    """ Update view for editing BomItem """
+
     model = BomItem
     form_class = EditBomItemForm
     template_name = 'part/bom-edit.html'
@@ -326,6 +378,7 @@ class BomItemEdit(AjaxUpdateView):
 
 
 class BomItemDelete(AjaxDeleteView):
+    """ Delete view for removing BomItem """
     model = BomItem
     template_name = 'part/bom-delete.html'
     context_object_name = 'item'
@@ -333,6 +386,7 @@ class BomItemDelete(AjaxDeleteView):
 
 
 class SupplierPartDetail(DetailView):
+    """ Detail view for SupplierPart """
     model = SupplierPart
     template_name = 'company/partdetail.html'
     context_object_name = 'part'
@@ -340,6 +394,8 @@ class SupplierPartDetail(DetailView):
 
 
 class SupplierPartEdit(AjaxUpdateView):
+    """ Update view for editing SupplierPart """
+
     model = SupplierPart
     template_name = 'company/partedit.html'
     context_object_name = 'part'
@@ -349,6 +405,8 @@ class SupplierPartEdit(AjaxUpdateView):
 
 
 class SupplierPartCreate(AjaxCreateView):
+    """ Create view for making new SupplierPart """
+
     model = SupplierPart
     form_class = EditSupplierPartForm
     ajax_template_name = 'modal_form.html'
@@ -356,6 +414,11 @@ class SupplierPartCreate(AjaxCreateView):
     context_object_name = 'part'
 
     def get_initial(self):
+        """ Provide initial data for new SupplierPart:
+
+        - If 'supplier_id' provided, pre-fill supplier field
+        - If 'part_id' provided, pre-fill part field
+        """
         initials = super(SupplierPartCreate, self).get_initial().copy()
 
         supplier_id = self.request.GET.get('supplier', None)
@@ -374,6 +437,7 @@ class SupplierPartCreate(AjaxCreateView):
 
 
 class SupplierPartDelete(AjaxDeleteView):
+    """ Delete view for removing a SupplierPart """
     model = SupplierPart
     success_url = '/supplier/'
     template_name = 'company/partdelete.html'