First working release.

Other files (not .docx) support is not guaranteed

modules/helpers/xml.py

@@ -0,0 +1,22 @@
+namespaces = {
+    "cp": "http://schemas.openxmlformats.org/package/2006/metadata/core-properties",
+    "dc": "http://purl.org/dc/elements/1.1/",
+    "dcterms": "http://purl.org/dc/terms/",
+    "dcmitype": "http://purl.org/dc/dcmitype/",
+    "xsi": "http://www.w3.org/2001/XMLSchema-instance",
+    "vt": "http://schemas.openxmlformats.org/officeDocument/2006/docPropsVTypes",
+    "": "http://schemas.openxmlformats.org/officeDocument/2006/extended-properties"
+}
+
+
+def get_value(parsed, name):
+    return str(parsed.findall(name, namespaces)[0].text) \
+        if parsed.findall(name, namespaces) else None
+
+
+def set_value(parsed, name, value):
+    if value:
+        parsed.findall(name, namespaces)[0].text = str(value)
+    else:
+        parsed.findall(name, namespaces)[0].getparent().remove(parsed.findall(name, namespaces)[0]) \
+            if parsed.findall(name, namespaces) else None