context manager examples

bindings/python/example_scripts/simple_book.py

@@ -11,15 +11,15 @@ from gnucash import Session
 uri = "xml:///tmp/simple_book.gnucash"
 
 print("uri:", uri)
-ses = Session(uri, is_new=True)
-book = ses.get_book()
+with Session(uri, is_new=True) as ses:
+    book = ses.get_book()
 
-#Call some methods that produce output to show that Book works
-book.get_root_account().SetDescription("hello, book")
-print("Book is saved:", not book.session_not_saved())
+    #Call some methods that produce output to show that Book works
+    book.get_root_account().SetDescription("hello, book")
+    print("Book is saved:", not book.session_not_saved())
 
-print("saving...")
-ses.save()
+    #As long as there's no exceptions, book is automatically saved
+    #when session ends.
+    print("saving...")
 
 print("Book is saved:", not book.session_not_saved())
-ses.end()

bindings/python/example_scripts/simple_session.py

@@ -19,18 +19,13 @@ except GnuCashBackendException as backend_exception:
 
 
 # create a new file, this requires a file type specification
-session = Session("xml://%s" % FILE_2, is_new=True)
-session.save()
-session.end()
-session.destroy()
+with Session("xml://%s" % FILE_2, is_new=True) as session:
+    book = session.book
+    root = book.get_root_account()
 
 # open the new file, try to open it a second time, detect the lock
-session = Session(FILE_2)
-try:
-    session_2 = Session(FILE_2)
-except GnuCashBackendException as backend_exception:
-    assert( ERR_BACKEND_LOCKED in backend_exception.errors )
-session.end()
-session.destroy()
-
-    
+with Session(FILE_2) as session:
+    try:
+        session_2 = Session(FILE_2)
+    except GnuCashBackendException as backend_exception:
+        assert( ERR_BACKEND_LOCKED in backend_exception.errors )