[gxml] Ported Python example to new API

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 0c6b68b49159fd5bd8f74fc4a9c4edd11469febd
Author: Daniel Espinosa <esodan gmail com>
Date:   Wed Sep 6 13:19:59 2017 -0700

    Ported Python example to new API

 examples/python/example.py |   25 ++++++++++++++-----------
 1 files changed, 14 insertions(+), 11 deletions(-)
---
diff --git a/examples/python/example.py b/examples/python/example.py
index a996a88..79afeb2 100755
--- a/examples/python/example.py
+++ b/examples/python/example.py
@@ -1,13 +1,15 @@
 #!/usr/bin/python
 
 from gi.repository import GXml;
+import gi
+gi.require_version('GXml', '0.16')
 from gi.repository import Gio;
 
 def create_a_document ():
     authors = ["John Green", "Jane Austen", "J.D. Salinger"];
     titles = ["The Fault in Our Stars", "Pride & Prejudice", "Nine Stories"];
 
-    doc = GXml.Document.new ();
+    doc = GXml.GomDocument.new ();
     root = doc.create_element ("Bookshelf");
     doc.append_child (root);
     root.set_attribute ("fullname", "John Green");
@@ -21,8 +23,8 @@ def create_a_document ():
         book.set_attribute ("title", titles[i]);
         books.append_child (book);
     
-    print "create_a_document:\n", doc.to_string (True, 4);
-    if None == doc.to_string (True, 4):
+    print "create_a_document:\n", doc.write_string()
+    if None == doc.write_string():
         print "ERROR: doc to string was null, but shouldn't be";
 
 def create_a_document_from_a_string ():
@@ -35,23 +37,24 @@ def create_a_document_from_a_string ():
 <Book author="J.D. Salinger" title="Nine Stories"/>
 </Books>
 </Bookshelf>""";
-    doc = GXml.Document.from_string (xml);
-    print "create_a_document_from_a_string:\n", doc.to_string (True, 4);
+    doc = GXml.GomDocument.from_string (xml);
+    print "create_a_document_from_a_string:\n", doc.write_string ()
     # TODO: why does this not indent when printed?
 
 def create_a_document_from_a_file ():
     can = Gio.Cancellable ();
     gfile = Gio.File.new_for_path ("bookshelf.xml");
-    doc = GXml.Document.from_gfile (gfile, can);
-    print "create_a_document_from_a_file:\n", doc.to_string (True, 4); # TODO: do these two values actually 
do anything?
+    doc = GXml.GomDocument.from_file (gfile);
+    print "create_a_document_from_a_file:\n", doc.write_string () # TODO: do these two values actually do 
anything?
 
 def create_a_document_from_a_path ():
-    doc = GXml.Document.from_path ("bookshelf.xml");
-    print "create_a_document_from_a_path:\n", doc.to_string (True, 4); # TODO: do these two values actually 
do anything?
+    doc = GXml.GomDocument.from_path ("bookshelf.xml");
+    print "create_a_document_from_a_path:\n", doc.write_string () # TODO: do these two values actually do 
anything?
 
 def saving_a_document_to_a_path ():
-    doc = GXml.Document.from_path ("bookshelf.xml");
-    doc.save_to_path ("bookshelf2.xml");
+    f = Gio.File.new_for_path("bookshelf2.xml")
+    doc = GXml.GomDocument.from_path ("bookshelf.xml");
+    doc.write_file (f);
     
 
 create_a_document ();