Comments on: Dynamically adding methods with metaprogramming : Ruby and Python http://codeblog.dhananjaynene.com/2010/01/dynamically-adding-methods-with-metaprogramming-ruby-and-python/ Code, code and code Tue, 28 Jun 2011 21:03:45 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Anyone for Perl 6 metaprogramming? « transfixed but not dead! http://codeblog.dhananjaynene.com/2010/01/dynamically-adding-methods-with-metaprogramming-ruby-and-python/comment-page-1/#comment-25 Anyone for Perl 6 metaprogramming? « transfixed but not dead! Sat, 16 Jan 2010 13:34:15 +0000 http://codeblog.dhananjaynene.com/?p=44#comment-25 [...] all the examples (in Perl 5 / Moose, Ruby, Javascript & Python) I think this one is the most clean and intuitive. Perl 6 has a good future if it keeps this [...] [...] all the examples (in Perl 5 / Moose, Ruby, Javascript & Python) I think this one is the most clean and intuitive. Perl 6 has a good future if it keeps this [...]

]]> By: Vitaly Babiy http://codeblog.dhananjaynene.com/2010/01/dynamically-adding-methods-with-metaprogramming-ruby-and-python/comment-page-1/#comment-22 Vitaly Babiy Fri, 15 Jan 2010 02:54:00 +0000 http://codeblog.dhananjaynene.com/?p=44#comment-22 Awesome post. Metaprogramming doesn't seem to be used as much in the python world as it is in the ruby world, but it nice to see how to implement these patterns if need be. Awesome post. Metaprogramming doesn’t seem to be used as much in the python world as it is in the ruby world, but it nice to see how to implement these patterns if need be.

]]> By: Dhananjay Nene http://codeblog.dhananjaynene.com/2010/01/dynamically-adding-methods-with-metaprogramming-ruby-and-python/comment-page-1/#comment-19 Dhananjay Nene Thu, 14 Jan 2010 18:39:04 +0000 http://codeblog.dhananjaynene.com/?p=44#comment-19 David, The difference actually is due to the languages per se. python does not allow reopening of a class to add methods to it the way ruby allows. The entry can be simply removed by using the del command as follows : <code lang="python"> def battle_cry(self): print '%s says zing!!!' % self.name Ninja.battle_cry = battle_cry # Remove the battle_cry entry del battle_cry </code> David,

The difference actually is due to the languages per se. python does not allow reopening of a class to add methods to it the way ruby allows.

The entry can be simply removed by using the del command as follows :

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def battle_cry(self):
    print '%s says zing!!!' % self.name
Ninja.battle_cry = battle_cry
# Remove the battle_cry entry
del battle_cry
]]> By: David Bacher http://codeblog.dhananjaynene.com/2010/01/dynamically-adding-methods-with-metaprogramming-ruby-and-python/comment-page-1/#comment-18 David Bacher Thu, 14 Jan 2010 17:50:09 +0000 http://codeblog.dhananjaynene.com/?p=44#comment-18 That's an interesting comparison. Could you contrast the ruby and python approaches in more detail? One thing that strikes me is namespace issues. It looks like your python code ends up defining functions in the global namespace and then assigning them to a class or instance, while the ruby code scopes the definitions more explicitly. That’s an interesting comparison. Could you contrast the ruby and python approaches in more detail? One thing that strikes me is namespace issues. It looks like your python code ends up defining functions in the global namespace and then assigning them to a class or instance, while the ruby code scopes the definitions more explicitly.

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