Added support for XML parsing

.gitignore

@@ -9,3 +9,4 @@
 /venv
 /dist
 /docs/html
+.vscode/

.travis.yml

@@ -1,9 +1,8 @@
 language: python
 python:
-    - "2.6"
     - "2.7"
-    - "3.3"
-    - "3.4"
     - "3.5"
+    - "3.6"
+    - "3.7"
 # command to run tests
 script: python setup.py test

pynliner/__init__.py

@@ -64,7 +64,7 @@ class Pynliner(object):
     output = False
 
     def __init__(self, log=None, allow_conditional_comments=False,
-                 preserve_entities=True):
+                 preserve_entities=True, is_xml=False):
         self.log = log
         cssutils.log.enabled = False if log is None else True
         self.extra_style_strings = []
@@ -73,6 +73,7 @@ def __init__(self, log=None, allow_conditional_comments=False,
         self.root_url = None
         self.relative_url = None
         self._substitutions = None
+        self.is_xml = is_xml
 
     def from_url(self, url):
         """Gets remote HTML page for conversion
@@ -179,9 +180,14 @@ def _unsubstitute_output(self):
     def _get_soup(self):
         """Convert source string to BeautifulSoup object. Sets it to self.soup.
 
+        If parsing xml (i.e. self.is_xml = True), then use xml parser.
+
         If using mod_wgsi, use html5 parsing to prevent BeautifulSoup
         incompatibility.
         """
+        if self.is_xml:
+            self.soup = BeautifulSoup(self.source_string.encode('utf-8'), "xml")
+            return 
         # Check if mod_wsgi is running
         # - see http://code.google.com/p/modwsgi/wiki/TipsAndTricks
         try:

setup.py

@@ -12,6 +12,7 @@
       install_requires=[
           'BeautifulSoup4 >= 4.4.1',
           'cssutils >=0.9.7',
+          'lxml',
       ],
       tests_require=[
           'mock'