Don't install unicodecsv on Python 3 and fallback to pythons built in csv library it it isn't installed.

setup.py

@@ -1,5 +1,8 @@
 #!/usr/bin/env python
 
+import sys
+
+
 try:
     from setuptools import setup, find_packages
 except ImportError:
@@ -16,6 +19,31 @@ except ImportError:
     pass
 
 
+PY3 = sys.version_info[0] == 3
+
+
+install_requires = [
+    "Django>=1.6.2,<1.7",
+    "South>=0.8.4",
+    "django-compressor>=1.3",
+    "django-libsass>=0.1",
+    "django-modelcluster>=0.1",
+    "django-taggit==0.11.2",
+    "django-treebeard==2.0",
+    "Pillow>=2.3.0",
+    "beautifulsoup4>=4.3.2",
+    "lxml>=3.3.0",
+    "Unidecode>=0.04.14",
+    "BeautifulSoup==3.2.1",  # django-compressor gets confused if we have lxml but not BS3 installed
+]
+
+
+if not PY3:
+    install_requires += [
+        "unicodecsv>=0.9.4"
+    ]
+
+
 setup(
     name='wagtail',
     version='0.3.1',
@@ -40,20 +68,6 @@ setup(
         'Framework :: Django',
         'Topic :: Internet :: WWW/HTTP :: Site Management',
     ],
-    install_requires=[
-        "Django>=1.6.2,<1.7",
-        "South>=0.8.4",
-        "django-compressor>=1.3",
-        "django-libsass>=0.1",
-        "django-modelcluster>=0.1",
-        "django-taggit==0.11.2",
-        "django-treebeard==2.0",
-        "Pillow>=2.3.0",
-        "beautifulsoup4>=4.3.2",
-        "lxml>=3.3.0",
-        'unicodecsv>=0.9.4',
-        'Unidecode>=0.04.14',
-        "BeautifulSoup==3.2.1",  # django-compressor gets confused if we have lxml but not BS3 installed
-    ],
+    install_requires=install_requires,
     zip_safe=False,
 )

wagtail/wagtailforms/views.py

@@ -1,5 +1,11 @@
 import datetime
-import unicodecsv
+
+try:
+    import unicodecsv as csv
+    using_unicodecsv = True
+except ImportError:
+    import csv
+    using_unicodecsv = False
 
 from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
 from django.core.exceptions import PermissionDenied
@@ -65,7 +71,11 @@ def list_submissions(request, page_id):
         # return a CSV instead
         response = HttpResponse(content_type='text/csv; charset=utf-8')
         response['Content-Disposition'] = 'attachment;filename=export.csv'
-        writer = unicodecsv.writer(response, encoding='utf-8')
+
+        if using_unicodecsv:
+            writer = csv.writer(response, encoding='utf-8')
+        else:
+            writer = csv.writer(response)
 
         header_row = ['Submission date'] + [label for name, label in data_fields]