Example script

example_loader_instance.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+
+import sys
+sys.path.insert(0, 'lib')
+
+from yaml import *
+
+ldr = SafeLoader()
+
+def dice_constructor1(loader, node):
+    value = loader.construct_scalar(node)
+    a, b = map(int, value.split('d'))
+    return [a,b]
+
+def dice_constructor2(loader, node):
+    value = loader.construct_scalar(node)
+    a, b = map(int, value.split('d'))
+    return [b,a]
+
+s = """
+- !dice 3d4
+"""
+
+
+
+add_constructor('!dice', dice_constructor1, SafeLoader)
+
+print()
+data = load(s, SafeLoader)
+print('1) SafeLoader -> %s' % data)
+data = load(s, ldr)
+print('1) Instance   -> %s' % data)
+
+
+
+ldr.add_constructor('!dice', dice_constructor2)
+
+print()
+data = load(s, SafeLoader)
+print('2) SafeLoader -> %s' % data)
+data = load(s, ldr)
+print('2) Instance   -> %s' % data)
+
+
+
+ldr.add_constructor('!dice', None)
+
+print()
+data = load(s, SafeLoader)
+print('3) SafeLoader -> %s' % data)
+data = load(s, ldr)
+print('3) Instance   -> %s' % data)