fixes #689

Author: jph00

fastcore/xml.py

@@ -208,7 +208,10 @@ def _to_xml(elm, lvl=0, indent=True, do_escape=True):
 # %% ../nbs/09_xml.ipynb
 def to_xml(elm, lvl=0, indent=True, do_escape=True):
     "Convert `ft` element tree into an XML string"
-    return Safe(_to_xml(elm, lvl, indent, do_escape=do_escape))
+    if isinstance(elm, (list,tuple,FT)) or hasattr(elm, '__ft__'):
+        return Safe(_to_xml(elm, lvl, indent, do_escape=do_escape))
+    if isinstance(elm, bytes): return elm.decode('utf-8')
+    return elm or ''
 
 # %% ../nbs/09_xml.ipynb
 @patch

nbs/09_xml.ipynb

@@ -468,7 +468,10 @@
     "#| export\n",
     "def to_xml(elm, lvl=0, indent=True, do_escape=True):\n",
     "    \"Convert `ft` element tree into an XML string\"\n",
-    "    return Safe(_to_xml(elm, lvl, indent, do_escape=do_escape))"
+    "    if isinstance(elm, (list,tuple,FT)) or hasattr(elm, '__ft__'):\n",
+    "        return Safe(_to_xml(elm, lvl, indent, do_escape=do_escape))\n",
+    "    if isinstance(elm, bytes): return elm.decode('utf-8')\n",
+    "    return elm or ''"
    ]
   },
   {