Add note to readme about backend.lock

1 files changed, 4 insertions, 2 deletions

diff --git a/README.rst b/README.rst
index 14d62c7..cb9e189 100755
--- a/README.rst
+++ b/README.rst
@@ -332,10 +332,12 @@ Using yoyo from python code
 
 The following example shows how to apply migrations from inside python code::
 
-    from yoyo import read_migrations, get_backend
+    from yoyo import read_migrations
+    from yoyo import get_backend
 
     backend = get_backend('postgres://myuser@localhost/mydatabase')
     migrations = read_migrations('path/to/migrations')
-    backend.apply_migrations(backend.to_apply(migrations))
+    with backend.lock():
+      backend.apply_migrations(backend.to_apply(migrations))
 
 .. :vim:sw=4:et