If a t tag has no text then the parser throws an error.

CHANGELOG

@@ -1,6 +1,8 @@
 
 Changelog
 =========
+* 0.3.4
+    * It is possible for `w:t` tags to have `text` set to `None`. This no longer causes an error when escaping that text.
 * 0.3.3
     * In the event that `cElementTree` has a problem parsing the document, a
       `MalformedDocxException` is raised instead of a `SyntaxError`

pydocx/DocxParser.py

@@ -577,12 +577,16 @@ def _is_style_on(self, el):
         return val.lower() not in DISABLED_VALUES
 
     def parse_t(self, el, parsed):
+        if el.text is None:
+            return ''
         return self.escape(el.text)
 
     def parse_break_tag(self, el, parsed):
         return self.break_tag()
 
     def parse_deletion(self, el, parsed):
+        if el.text is None:
+            return ''
         return self.deletion(el.text, '', '')
 
     def parse_insertion(self, el, parsed):

pydocx/tests/templates/t.xml

@@ -1 +1,5 @@
+{% if text %}
 <w:t>{{ text }}</w:t>
+{% else %}
+<w:t />
+{% endif %}

pydocx/tests/test_xml.py

@@ -1231,3 +1231,25 @@ def get_xml(self):
             body += tag
         xml = DXB.xml(body)
         return xml.encode('utf-8')
+
+
+class NoTextInTTagTestCase(_TranslationTestCase):
+    expected_output = u"""
+    """
+
+    def get_xml(self):
+        tags = [
+            DXB.p_tag(
+                [
+                    DXB.r_tag(
+                        [DXB.t_tag(None)],
+                    ),
+                ],
+            ),
+        ]
+
+        body = ''
+        for tag in tags:
+            body += tag
+        xml = DXB.xml(body)
+        return xml.encode('utf-8')