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I know very little of Ruby, but difference 13 states that Ruby has stronger metaprogramming features in that "Python doesn't have define_method, class_eval, and

• masklinn 14y ago
  * method_missing is "return a callable from __getattr__" * define_method simply isn't needed, just set a function as attribute on a class tadaa you've defined a method: >>> class A: pass ... >>> a = A() >>> a.foo() Traceback (most recent call last): File "<stdin>", line 1, in <module> AttributeError: 'A' object has no attribute 'foo' >>> A.foo = lambda self: 3 >>> a.foo <bound method A.<lambda> of <__main__.A object at 0x100623c10>> >>> a.foo() 3 * class_eval I never really understood the use case for, if it's just to add new methods to an existing class, take the previous recipe and annotate the function with the `classmethod` decorator: >>> A.bar = classmethod(lambda cls: 4) >>> A.bar() 4 >>> a.bar() 4 but there might be more to it I missed.