What's the best why of dumping the location of a Python function/method?












-1














I'm working on a framework that takes a python function/classmethod/staticmethod as its input, then execute the given one remotely.



How could I dump the full location of a python function? It would be fairly easy if the function is at the top level, then I'll only need to save the module name and the function name then retrieve the function by getattr.



So far as I consider the nested functions such as the staticmethod, python doesn't maintain the connection between the method and its container. Therefore you lose part of the information, and if you still would like to use the getattr mechanism, there will be a nested loop for searching all nested objects.



I'm thinking of the co_firstlineno for the extra clue of retrieving the function object later, but I didn't find a proper way of getting the function object from the module by line. I even tried to dump the code object through marshal, but reassembling the function object from the code object would be a nightmare.






python serialization cpython python-internals







share|improve this question
























  • You should take a look at the inspect module of the standard library: docs.python.org/3/library/inspect.html
    – Vladimir Poghosyan
    Nov 26 at 18:42










  • Hey @VladimirPoghosyan, thanks for your response. I've checked the inspect module at the very beginning, but it doesn't seem to be like the solution. The module is all about wrapping the methods of FunctionType and CodeType, which lose this feature internally. The same thing happens in the pickle module as well. You cannot pickle a static method since it cannot find the method from its module.
    – Calvin
    Nov 27 at 21:13










  • Note that the Python standard library pickle has to solve the same problem *and doesn’t support anything beyond base module.name references. Take a look at how / what the dill project does; it extends pickle beyond module.name references.
    – Martijn Pieters♦
    Dec 8 at 5:47
















-1














I'm working on a framework that takes a python function/classmethod/staticmethod as its input, then execute the given one remotely.



How could I dump the full location of a python function? It would be fairly easy if the function is at the top level, then I'll only need to save the module name and the function name then retrieve the function by getattr.



So far as I consider the nested functions such as the staticmethod, python doesn't maintain the connection between the method and its container. Therefore you lose part of the information, and if you still would like to use the getattr mechanism, there will be a nested loop for searching all nested objects.



I'm thinking of the co_firstlineno for the extra clue of retrieving the function object later, but I didn't find a proper way of getting the function object from the module by line. I even tried to dump the code object through marshal, but reassembling the function object from the code object would be a nightmare.






python serialization cpython python-internals







share|improve this question
























  • You should take a look at the inspect module of the standard library: docs.python.org/3/library/inspect.html
    – Vladimir Poghosyan
    Nov 26 at 18:42










  • Hey @VladimirPoghosyan, thanks for your response. I've checked the inspect module at the very beginning, but it doesn't seem to be like the solution. The module is all about wrapping the methods of FunctionType and CodeType, which lose this feature internally. The same thing happens in the pickle module as well. You cannot pickle a static method since it cannot find the method from its module.
    – Calvin
    Nov 27 at 21:13










  • Note that the Python standard library pickle has to solve the same problem *and doesn’t support anything beyond base module.name references. Take a look at how / what the dill project does; it extends pickle beyond module.name references.
    – Martijn Pieters♦
    Dec 8 at 5:47














-1












-1








-1







I'm working on a framework that takes a python function/classmethod/staticmethod as its input, then execute the given one remotely.



How could I dump the full location of a python function? It would be fairly easy if the function is at the top level, then I'll only need to save the module name and the function name then retrieve the function by getattr.



So far as I consider the nested functions such as the staticmethod, python doesn't maintain the connection between the method and its container. Therefore you lose part of the information, and if you still would like to use the getattr mechanism, there will be a nested loop for searching all nested objects.



I'm thinking of the co_firstlineno for the extra clue of retrieving the function object later, but I didn't find a proper way of getting the function object from the module by line. I even tried to dump the code object through marshal, but reassembling the function object from the code object would be a nightmare.






python serialization cpython python-internals







share|improve this question















I'm working on a framework that takes a python function/classmethod/staticmethod as its input, then execute the given one remotely.



How could I dump the full location of a python function? It would be fairly easy if the function is at the top level, then I'll only need to save the module name and the function name then retrieve the function by getattr.



So far as I consider the nested functions such as the staticmethod, python doesn't maintain the connection between the method and its container. Therefore you lose part of the information, and if you still would like to use the getattr mechanism, there will be a nested loop for searching all nested objects.



I'm thinking of the co_firstlineno for the extra clue of retrieving the function object later, but I didn't find a proper way of getting the function object from the module by line. I even tried to dump the code object through marshal, but reassembling the function object from the code object would be a nightmare.






python serialization cpython python-internals




python serialization cpython python-internals






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Nov 22 at 22:41









jonrsharpe

76.7k11100207




76.7k11100207










asked Nov 22 at 22:14









Calvin

215




215












  • You should take a look at the inspect module of the standard library: docs.python.org/3/library/inspect.html
    – Vladimir Poghosyan
    Nov 26 at 18:42










  • Hey @VladimirPoghosyan, thanks for your response. I've checked the inspect module at the very beginning, but it doesn't seem to be like the solution. The module is all about wrapping the methods of FunctionType and CodeType, which lose this feature internally. The same thing happens in the pickle module as well. You cannot pickle a static method since it cannot find the method from its module.
    – Calvin
    Nov 27 at 21:13










  • Note that the Python standard library pickle has to solve the same problem *and doesn’t support anything beyond base module.name references. Take a look at how / what the dill project does; it extends pickle beyond module.name references.
    – Martijn Pieters♦
    Dec 8 at 5:47


















  • You should take a look at the inspect module of the standard library: docs.python.org/3/library/inspect.html
    – Vladimir Poghosyan
    Nov 26 at 18:42










  • Hey @VladimirPoghosyan, thanks for your response. I've checked the inspect module at the very beginning, but it doesn't seem to be like the solution. The module is all about wrapping the methods of FunctionType and CodeType, which lose this feature internally. The same thing happens in the pickle module as well. You cannot pickle a static method since it cannot find the method from its module.
    – Calvin
    Nov 27 at 21:13










  • Note that the Python standard library pickle has to solve the same problem *and doesn’t support anything beyond base module.name references. Take a look at how / what the dill project does; it extends pickle beyond module.name references.
    – Martijn Pieters♦
    Dec 8 at 5:47
















You should take a look at the inspect module of the standard library: docs.python.org/3/library/inspect.html
– Vladimir Poghosyan
Nov 26 at 18:42




You should take a look at the inspect module of the standard library: docs.python.org/3/library/inspect.html
– Vladimir Poghosyan
Nov 26 at 18:42












Hey @VladimirPoghosyan, thanks for your response. I've checked the inspect module at the very beginning, but it doesn't seem to be like the solution. The module is all about wrapping the methods of FunctionType and CodeType, which lose this feature internally. The same thing happens in the pickle module as well. You cannot pickle a static method since it cannot find the method from its module.
– Calvin
Nov 27 at 21:13




Hey @VladimirPoghosyan, thanks for your response. I've checked the inspect module at the very beginning, but it doesn't seem to be like the solution. The module is all about wrapping the methods of FunctionType and CodeType, which lose this feature internally. The same thing happens in the pickle module as well. You cannot pickle a static method since it cannot find the method from its module.
– Calvin
Nov 27 at 21:13












Note that the Python standard library pickle has to solve the same problem *and doesn’t support anything beyond base module.name references. Take a look at how / what the dill project does; it extends pickle beyond module.name references.
– Martijn Pieters♦
Dec 8 at 5:47




Note that the Python standard library pickle has to solve the same problem *and doesn’t support anything beyond base module.name references. Take a look at how / what the dill project does; it extends pickle beyond module.name references.
– Martijn Pieters♦
Dec 8 at 5:47

















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