Same as listinherited.py, But more formatted

progrmoiz · progrmoiz · commit 61f98a9bd4bb · 2017-12-04T14:33:44.000+05:00
diff --git a/listinherited2.py b/listinherited2.py
@@ -0,0 +1,61 @@
+#!/usr/bin/env python3
+# File listinherited.py (2.x + 3.x)
+
+
+class ListInherited:
+    """
+    Use dir() to collection both instance attr and names inherited from
+    its classes; Python 3.x shows more name than 2.x because of the
+    implied object superclass in the new-style class model; getattr()
+    fetches inherited names not in self.__dict__; user __str__, not
+    __repr__, or else the loops when printing bound method!
+    """
+
+    def __attrname(self, indent=' '*4):
+        result = 'Unders%s\n%s%%s\nOthers%s\n' % ('-'*77, indent, '-'*77)
+        unders = []
+        for attr in dir(self):  # instance dir
+            if attr[:2] == '__' and attr[-2:] == '__':
+                unders.append(attr)
+            else:
+                display = str(getattr(self, attr))[:82-(len(indent) + len(attr))]
+                result += '%s%s=%s\n' % (indent, attr, display)
+        return result % ', '.join(unders)
+
+    def __str__(self):
+        return '<Instance of %s, address %s:\n%s>' % (
+            self.__class__.__name__,
+            id(self),           # My address
+            self.__attrname())  # name=value list
+
+
+def tester(listerclass, sept=False):
+
+    class Super:
+
+        def __init__(self):
+            self.data1 = 'spam'
+
+        def ham(self):
+            pass
+
+    class Sub(Super, listerclass):
+
+        def __init__(self):
+            Super.__init__(self)
+            self.data2 = 'eggs'
+            self.data3 = 42
+
+        def spam(self):
+            pass
+
+    instance = Sub()
+    print(instance)
+    if sept:
+        print('-' * 80)
+
+
+if __name__ == '__main__':
+
+    tester(ListInherited)
+
