initial creation

py3interm/EXAMPLES/json_custom_encoding.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python
+#
+import json
+from datetime import date
+
+
+class Parrot():  # <1>
+    def __init__(self, name, color):
+        self._name = name
+        self._color = color
+
+    @property
+    def name(self):  # <2>
+        return self._name
+
+    @property
+    def color(self):
+        return self._color
+
+
+parrots = [  # <3>
+    Parrot('Polly', 'green'),  #
+    Parrot('Peggy', 'blue'),
+    Parrot('Roger', 'red'),
+]
+
+
+def encode(obj):  # <4>
+    if isinstance(obj, date):  # <5>
+        return obj.ctime()  # <6>
+    elif isinstance(obj, Parrot):  # <7>
+        return {'name': obj.name, 'color': obj.color}  # <8>
+    return obj  # <9>
+
+
+data = {  # <10>
+    'spam': [1, 2, 3],
+    'ham': ('a', 'b', 'c'),
+    'toast': date(2014, 8, 1),
+    'parrots': parrots,
+}
+
+print(json.dumps(data, default=encode, indent=4))  # <11>