Fixed for XPath

Backend-libXML/Parser.py

@@ -1,5 +1,5 @@
 from lxml import etree
-
+from io import BytesIO
 
 def prettify(source: str) -> str:
     """Method used to pretty format given XML
@@ -48,8 +48,8 @@ def xpath(source: str, xpath: str) -> str:
     :return: Nodes selected using XPath
     """
 
-    
-    root = etree.XML(source)
+    byte_input = BytesIO(source.encode("utf-8"))
+    root = etree.parse(byte_input).getroot()
     nsmap = root.nsmap
 
     # LXML doesn't accept empty (None) namespace prefix,
@@ -61,7 +61,7 @@ def xpath(source: str, xpath: str) -> str:
     
     # root.xpath can return 4 types: float, string, bool and list.
     # List is the only one that can't be simply converted to str
-    if result is not list:
+    if type(result) is not list:
         return str(result)
     else:
         result_string = ""