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    <p>I went and took the code found <a href="https://web.archive.org/web/20071006162417/http://book.opensourceproject.org.cn/lamp/python/pythoncook2/opensource/0596007973/pythoncook2-chp-7-sect-6.html" rel="nofollow noreferrer">here</a> and removed the dependency for the deprecated "new" module.</p> <pre><code>import types, copy_reg def code_ctor(*args): # delegate to new.code the construction of a new code object return types.CodeType(*args) def reduce_code(co): # a reductor function must return a tuple with two items: first, the # constructor function to be called to rebuild the argument object # at a future de-serialization time; then, the tuple of arguments # that will need to be passed to the constructor function. if co.co_freevars or co.co_cellvars: raise ValueError, "Sorry, cannot pickle code objects from closures" return code_ctor, (co.co_argcount, co.co_nlocals, co.co_stacksize, co.co_flags, co.co_code, co.co_consts, co.co_names, co.co_varnames, co.co_filename, co.co_name, co.co_firstlineno, co.co_lnotab) # register the reductor to be used for pickling objects of type 'CodeType' copy_reg.pickle(types.CodeType, reduce_code) if __name__ == '__main__': # example usage of our new ability to pickle code objects import cPickle # a function (which, inside, has a code object, of course) def f(x): print 'Hello,', x # serialize the function's code object to a string of bytes pickled_code = cPickle.dumps(f.func_code) # recover an equal code object from the string of bytes recovered_code = cPickle.loads(pickled_code) # build a new function around the rebuilt code object g = types.FunctionType(recovered_code, globals( )) # check what happens when the new function gets called g('world') </code></pre>
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    1. POWhat are the arguments to the types.CodeType() python call?
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    1. POWhat are the arguments to the types.CodeType() python call?
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    1. COThat helped a lot @something, thank you... Had to fiddle with the type.CodeType to make it work. The argument list is exactly like the one [here](http://docs.python.org/library/new.html#new.code)
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    2. COIt took me a bit to realize how this fits together with my answer: there are two optional arguments, freevars and cellvars. I assume they were added later.
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    3. CO`freevars` and `cellvars` are used in closures. They're optional because not all functions use them.
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