Initial data commit

Task/Reflection-List-properties/Python/reflection-list-properties.py

@@ -0,0 +1,81 @@
+class Parent(object):
+    __priv = 'private'
+
+    def __init__(self, name):
+        self.name = name
+
+    def __repr__(self):
+        return '%s(%s)' % (type(self).__name__, self.name)
+
+    def doNothing(self):
+        pass
+
+import re
+
+class Child(Parent):
+    # prefix for "private" fields
+    __rePrivate = re.compile('^_(Child|Parent)__')
+    # used when setting dynamic property values
+    __reBleh = re.compile('\Wbleh$')
+    @property
+    def reBleh(self):
+        return self.__reBleh
+
+    def __init__(self, name, *args):
+        super(Child, self).__init__(name)
+        self.args = args
+
+    def __dir__(self):
+        myDir = filter(
+            # filter out private fields
+            lambda p: not self.__rePrivate.match(p),
+            list(set( \
+                sum([dir(base) for base in type(self).__bases__], []) \
+                + type(self).__dict__.keys() \
+                + self.__dict__.keys() \
+            )))
+        return myDir + map(
+            # dynamic properties
+            lambda p: p + '_bleh',
+            filter(
+                # don't add dynamic properties for methods and other special properties
+                lambda p: (p[:2] != '__' or p[-2:] != '__') and not callable(getattr(self, p)),
+                myDir))
+
+    def __getattr__(self, name):
+        if name[-5:] == '_bleh':
+            # dynamic '_bleh' properties
+            return str(getattr(self, name[:-5])) + ' bleh'
+        if hasattr(super(Child, chld), '__getattr__'):
+            return super(Child, self).__getattr__(name)
+        raise AttributeError("'%s' object has no attribute '%s'" % (type(self).__name__, name))
+
+    def __setattr__(self, name, value):
+        if name[-5:] == '_bleh':
+            # skip backing properties that are methods
+            if not (hasattr(self, name[:-5]) and callable(getattr(self, name[:-5]))):
+                setattr(self, name[:-5], self.reBleh.sub('', value))
+        elif hasattr(super(Child, self), '__setattr__'):
+            super(Child, self).__setattr__(name, value)
+        elif hasattr(self, '__dict__'):
+            self.__dict__[name] = value
+
+    def __repr__(self):
+        return '%s(%s, %s)' % (type(self).__name__, self.name, str(self.args).strip('[]()'))
+
+    def doStuff(self):
+        return (1+1.0/1e6) ** 1e6
+
+par = Parent('par')
+par.parent = True
+dir(par)
+#['_Parent__priv', '__class__', ..., 'doNothing', 'name', 'parent']
+inspect.getmembers(par)
+#[('_Parent__priv', 'private'), ('__class__', <class '__main__.Parent'>), ..., ('doNothing', <bound method Parent.doNothing of <__main__.Parent object at 0x100777650>>), ('name', 'par'), ('parent', True)]
+
+chld = Child('chld', 0, 'I', 'two')
+chld.own = "chld's own"
+dir(chld)
+#['__class__', ..., 'args', 'args_bleh', 'doNothing', 'doStuff', 'name', 'name_bleh', 'own', 'own_bleh', 'reBleh', 'reBleh_bleh']
+inspect.getmembers(chld)
+#[('__class__', <class '__main__.Child'>), ..., ('args', (0, 'I', 'two')), ('args_bleh', "(0, 'I', 'two') bleh"), ('doNothing', <bound method Child.doNothing of Child(chld, 0, 'I', 'two')>), ('doStuff', <bound method Child.doStuff of Child(chld, 0, 'I', 'two')>), ('name', 'chld'), ('name_bleh', 'chld bleh'), ('own', "chld's own"), ('own_bleh', "chld's own bleh"), ('reBleh', <_sre.SRE_Pattern object at 0x10067bd20>), ('reBleh_bleh', '<_sre.SRE_Pattern object at 0x10067bd20> bleh')]