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    <p>I guess using Jython, you can do anything with Python that you can do in Java.</p> <p>Conversely, Python has the PyPy compiler, which is pretty cool - a virtual machine with multiple backeds (Java Runtime, LLVM, .net, and Python IIRC), multiple garbage collectors, multiple implementations (Stackless), etc. I know Java has a big choice of virtual machines, but the growth of PyPy is amazing, due to it being written in RPython - a fairly productive language.</p> <p>Also, can a Java do this, in 1 file and less that 20 lines, with no library imports? Obviously both languages have libraries that can do this, but I'm just talking about the flexibility of the languages.</p> <pre><code>class Logger(object): # boilerplate code def log(self,level,msg,*args,**kwargs): # *args, **kwargs = flexible arguments self._log(level,msg,*args,**kwargs) # call with flexible argments def _log(self,level,msg,*args,**kwargs): # override me at runtime :) # I think Java people call this Dependency Runtime Injection if level&gt;1: print msg,args,kwargs logger = Logger() # boilerplate code def logged(level): # what pattern do you call this? def logged_decorator(function): # and this? def func(*args,**kwars): name = func.__name__ # look ma, reflective metaprogramming! logger.log(level,name,*args,**kwargs) return func(*args,**kwargs) return func # boilerplate code return logged_decorator # boilerplate code </code></pre> <p>Example use:</p> <pre><code>@logged def my_func(arg1,arg2): # your code here pass </code></pre>
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