[xmlparser] Add parser warning list

Author: mpsonntag

odml/tools/xmlparser.py

@@ -6,7 +6,6 @@
 
     python -m odml.tools.xmlparser file.odml
 """
-#TODO make this module a parser class, allow arguments (e.g. skip_errors=1 to parse even broken documents)
 import sys
 from odml import format
 from lxml import etree as ET
@@ -148,6 +147,7 @@ def __init__(self, ignore_errors=False, filename=None):
         self.tags = dict([(obj._xml_name, obj) for obj in format.__all__])
         self.ignore_errors = ignore_errors
         self.filename = filename
+        self.warnings = []
 
     @staticmethod
     def _handle_version(root):
@@ -212,6 +212,7 @@ def warn(self, msg, elem):
             msg = "warning[%s:%d:<%s>]: %s\n" % (self.filename, elem.sourceline, elem.tag, msg)
         else:
             msg = "warning: %s\n" % msg
+        self.warnings.append(msg)
         sys.stderr.write(msg)
 
     def parse_element(self, node):