In python3 import bs4 not BeautifulSoup which will work only in python2

compressor/parser/beautifulsoup.py

@@ -4,6 +4,7 @@ from django.core.exceptions import ImproperlyConfigured
 from compressor.exceptions import ParserError
 from compressor.parser import ParserBase
 from compressor.utils.decorators import cached_property
+from django.utils import six
 
 try:
     from django.utils.encoding import smart_text
@@ -17,6 +18,9 @@ class BeautifulSoupParser(ParserBase):
     @cached_property
     def soup(self):
         try:
+            if six.PY3:
+                from bs4 import BeautifulSoup
+            else:
                 from BeautifulSoup import BeautifulSoup
             return BeautifulSoup(self.content)
         except ImportError as err:
@@ -25,9 +29,15 @@ class BeautifulSoupParser(ParserBase):
             raise ParserError("Error while initializing Parser: %s" % err)
 
     def css_elems(self):
+        if six.PY3:
+            return self.soup.find_all({'link': True, 'style': True})
+        else:
             return self.soup.findAll({'link': True, 'style': True})
 
     def js_elems(self):
+        if six.PY3:
+            return self.soup.find_all('script')
+        else:
             return self.soup.findAll('script')
 
     def elem_attribs(self, elem):