Menu
>>> from collections import defaultdict
>>> import json
>>> def tree(): return defaultdict(tree)
>>> t = tree()
>>> t['a']['b'] = 'foo'
>>> t['a']['c'] = 'bar'
>>> json.dumps(t)
'{"a": {"c": "bar", "b": "foo"}}'
.
>>> from operator import methodcaller
>>> methodcaller('__call__', 2, 10)(pow)
1024
.
>>> getattr(__import__('sys'), 'stdout').write('hello\n')
.
>>> class A(object):
... pass
...
>>> a = A()
>>> b = A()
>>> def foo(self):
... print "foo"
...
>>> import types
>>> a.foo = types.MethodType(foo, a)
>>> a.foo()
foo
>>> b.foo()
Traceback (most recent call last):
File "<input>", line 1, in <module>
AttributeError: 'A' object has no attribute 'foo'