Re: How to determine which method was used in an inheritance heirarchy?
On Jul 16, 2007, at 10:35 AM, Chris Mellon wrote: > On 7/16/07, Erik Jones <[EMAIL PROTECTED]> wrote: >> On Jul 16, 2007, at 3:37 AM, Gabriel Genellina wrote: >> >>> En Mon, 16 Jul 2007 03:56:18 -0300, Erik Jones <[EMAIL PROTECTED]> >>> escribió: >>> Perhaps an even better example of what I'm trying to do would be in order (this is minus any exception handling): import sys def mytrace(frame, event, arg): if event == 'call': func_name = frame.f_code.co_name if func_name in frame.f_locals['self'].__class__.__dict__: print frame.f_locals['self'].__class__.__name__ else: for base in frame.f_locals ['self'].__class__.__bases__: if func_name in base.__dict__: print base.__name__ break class A(object): def __init__(self): pass class B(A): def __init__(self): A.__init__(self) sys.settrace(mytrace) B() This will output: B B >>> >>> If you don't mind post-processing the results, you can log the >>> function >>> name and source module (from frame.f_code.co_name and >>> co_filename) and >>> current line number (frame.f_lineno). Later, obtaining the class >>> name from >>> those is a bit tricky (and not even the inspect module does it >>> right), but >>> perhaps using the tokenizer module, watching for lines that contain >>> "class" is enough. >> >> >> I was afraid of that. I used pretty much that tokenizer trick for a >> unit test generator I wrote in php a while back and felt like that >> was pretty clunky then. >> > > > Hacky, but maybe this will work: > > import sys > import inspect > > def mytrace(frame, event, arg): > if event == 'call': > func_name = frame.f_code.co_name > klassOb = frame.f_locals['self'].__class__ > for klass in inspect.getmro(klassOb): > cf = klass.__dict__.get(func_name) > if hasattr(cf, "func_code") and cf.func_code == > frame.f_code: > print klass.__name__ > > > class A(object): > def __init__(self): > pass > > class B(A): > def __init__(self): > A.__init__(self) > > sys.settrace(mytrace) > B() Chris, that is absolutely perfect. Also, I don't think there is such a thing as profiling code that isn't hacky ;) Erik Jones Software Developer | Emma® [EMAIL PROTECTED] 800.595.4401 or 615.292.5888 615.292.0777 (fax) Emma helps organizations everywhere communicate & market in style. Visit us online at http://www.myemma.com -- http://mail.python.org/mailman/listinfo/python-list
Re: How to determine which method was used in an inheritance heirarchy?
On 7/16/07, Erik Jones <[EMAIL PROTECTED]> wrote: > On Jul 16, 2007, at 3:37 AM, Gabriel Genellina wrote: > > > En Mon, 16 Jul 2007 03:56:18 -0300, Erik Jones <[EMAIL PROTECTED]> > > escribió: > > > >> Perhaps an even better example of what I'm trying to do would be in > >> order (this is minus any exception handling): > >> > >> import sys > >> > >> def mytrace(frame, event, arg): > >> if event == 'call': > >> func_name = frame.f_code.co_name > >> > >> if func_name in frame.f_locals['self'].__class__.__dict__: > >> print frame.f_locals['self'].__class__.__name__ > >> else: > >> for base in frame.f_locals['self'].__class__.__bases__: > >> if func_name in base.__dict__: > >> print base.__name__ > >> break > >> > >> > >> class A(object): > >> def __init__(self): > >> pass > >> > >> class B(A): > >> def __init__(self): > >> A.__init__(self) > >> > >> sys.settrace(mytrace) > >> B() > >> > >> This will output: > >> > >> B > >> B > > > > If you don't mind post-processing the results, you can log the > > function > > name and source module (from frame.f_code.co_name and co_filename) and > > current line number (frame.f_lineno). Later, obtaining the class > > name from > > those is a bit tricky (and not even the inspect module does it > > right), but > > perhaps using the tokenizer module, watching for lines that contain > > "class" is enough. > > > I was afraid of that. I used pretty much that tokenizer trick for a > unit test generator I wrote in php a while back and felt like that > was pretty clunky then. > Hacky, but maybe this will work: import sys import inspect def mytrace(frame, event, arg): if event == 'call': func_name = frame.f_code.co_name klassOb = frame.f_locals['self'].__class__ for klass in inspect.getmro(klassOb): cf = klass.__dict__.get(func_name) if hasattr(cf, "func_code") and cf.func_code == frame.f_code: print klass.__name__ class A(object): def __init__(self): pass class B(A): def __init__(self): A.__init__(self) sys.settrace(mytrace) B() -- http://mail.python.org/mailman/listinfo/python-list
Re: How to determine which method was used in an inheritance heirarchy?
On Jul 16, 2007, at 3:37 AM, Gabriel Genellina wrote: > En Mon, 16 Jul 2007 03:56:18 -0300, Erik Jones <[EMAIL PROTECTED]> > escribió: > >> Perhaps an even better example of what I'm trying to do would be in >> order (this is minus any exception handling): >> >> import sys >> >> def mytrace(frame, event, arg): >> if event == 'call': >> func_name = frame.f_code.co_name >> >> if func_name in frame.f_locals['self'].__class__.__dict__: >> print frame.f_locals['self'].__class__.__name__ >> else: >> for base in frame.f_locals['self'].__class__.__bases__: >> if func_name in base.__dict__: >> print base.__name__ >> break >> >> >> class A(object): >> def __init__(self): >> pass >> >> class B(A): >> def __init__(self): >> A.__init__(self) >> >> sys.settrace(mytrace) >> B() >> >> This will output: >> >> B >> B > > If you don't mind post-processing the results, you can log the > function > name and source module (from frame.f_code.co_name and co_filename) and > current line number (frame.f_lineno). Later, obtaining the class > name from > those is a bit tricky (and not even the inspect module does it > right), but > perhaps using the tokenizer module, watching for lines that contain > "class" is enough. I was afraid of that. I used pretty much that tokenizer trick for a unit test generator I wrote in php a while back and felt like that was pretty clunky then. Erik Jones Software Developer | Emma® [EMAIL PROTECTED] 800.595.4401 or 615.292.5888 615.292.0777 (fax) Emma helps organizations everywhere communicate & market in style. Visit us online at http://www.myemma.com -- http://mail.python.org/mailman/listinfo/python-list
Re: How to determine which method was used in an inheritance heirarchy?
En Mon, 16 Jul 2007 03:56:18 -0300, Erik Jones <[EMAIL PROTECTED]> escribió: > Perhaps an even better example of what I'm trying to do would be in > order (this is minus any exception handling): > > import sys > > def mytrace(frame, event, arg): > if event == 'call': > func_name = frame.f_code.co_name > > if func_name in frame.f_locals['self'].__class__.__dict__: > print frame.f_locals['self'].__class__.__name__ > else: > for base in frame.f_locals['self'].__class__.__bases__: > if func_name in base.__dict__: > print base.__name__ > break > > > class A(object): > def __init__(self): > pass > > class B(A): > def __init__(self): > A.__init__(self) > > sys.settrace(mytrace) > B() > > This will output: > > B > B If you don't mind post-processing the results, you can log the function name and source module (from frame.f_code.co_name and co_filename) and current line number (frame.f_lineno). Later, obtaining the class name from those is a bit tricky (and not even the inspect module does it right), but perhaps using the tokenizer module, watching for lines that contain "class" is enough. -- Gabriel Genellina -- http://mail.python.org/mailman/listinfo/python-list
Re: How to determine which method was used in an inheritance heirarchy?
On Jul 16, 2007, at 12:53 AM, Michele Simionato wrote: > On Jul 16, 7:18 am, Erik Jones <[EMAIL PROTECTED]> wrote: >> On Jul 15, 2007, at 11:23 PM, Michele Simionato wrote: >> >>> On Jul 16, 5:51 am, Erik Jones <[EMAIL PROTECTED]> wrote: Say you're given a call event frame for a method call. How can you tell if the code being executed came from a super class of the object or class the method was called on? >> Erik Jones >> >>> You look if the method was defined in self.__class__.__dict__. >> >>>Michele Simionato >> >> That doesn't seem to cover calling super class __init__ methods. >> > > I am probably missing something. In the following code the > method check_init checks if the current instance > possess an __init__ or if it just inherits one > from the ancestors. Is this what you want? > > class B(object): > def __init__(self): > 'something' > def check_init(self): > if '__init__' in self.__class__.__dict__: > print 'possesses __init__' > else: > print 'inherits __init__' > > class C(B): > 'something else' > def __init__(self): > print 'calling C.__init__' > > class D(B): > pass > > c = C() > d = D() > > c.check_init() #possesses __init__ > d.check_init() #inherits __init__ Ok, I see how I was pretty vague with my original questions. Given the pattern where you need to call a base class's constructor (or, other overriden method of the same name as that being called on the child class object): class A(object): def __init__(self): print self.__class__.__name__ class B(A): def __init__(self): A.__init__(self) print self.__class__.__name__ B() This will output: B B How can I get A B Erik Jones Software Developer | Emma® [EMAIL PROTECTED] 800.595.4401 or 615.292.5888 615.292.0777 (fax) Emma helps organizations everywhere communicate & market in style. Visit us online at http://www.myemma.com -- http://mail.python.org/mailman/listinfo/python-list
Re: How to determine which method was used in an inheritance heirarchy?
On Jul 16, 2007, at 1:31 AM, Erik Jones wrote: > On Jul 16, 2007, at 12:53 AM, Michele Simionato wrote: > >> On Jul 16, 7:18 am, Erik Jones <[EMAIL PROTECTED]> wrote: >>> On Jul 15, 2007, at 11:23 PM, Michele Simionato wrote: >>> On Jul 16, 5:51 am, Erik Jones <[EMAIL PROTECTED]> wrote: > Say you're given a call event frame for a method call. How can > you > tell if the code being executed came from a super class of the > object > or class the method was called on? >>> > Erik Jones >>> You look if the method was defined in self.__class__.__dict__. >>> Michele Simionato >>> >>> That doesn't seem to cover calling super class __init__ methods. >>> >> >> I am probably missing something. In the following code the >> method check_init checks if the current instance >> possess an __init__ or if it just inherits one >> from the ancestors. Is this what you want? >> >> class B(object): >> def __init__(self): >> 'something' >> def check_init(self): >> if '__init__' in self.__class__.__dict__: >> print 'possesses __init__' >> else: >> print 'inherits __init__' >> >> class C(B): >> 'something else' >> def __init__(self): >> print 'calling C.__init__' >> >> class D(B): >> pass >> >> c = C() >> d = D() >> >> c.check_init() #possesses __init__ >> d.check_init() #inherits __init__ > > Ok, I see how I was pretty vague with my original questions. > Given the pattern where you need to call a base class's constructor > (or, other overriden method of the same name as that being called > on the child class object): > > class A(object): > def __init__(self): > print self.__class__.__name__ > > class B(A): > def __init__(self): > A.__init__(self) > print self.__class__.__name__ > > B() > > This will output: > > B > B > > How can I get > > A > B Perhaps an even better example of what I'm trying to do would be in order (this is minus any exception handling): import sys def mytrace(frame, event, arg): if event == 'call': func_name = frame.f_code.co_name if func_name in frame.f_locals['self'].__class__.__dict__: print frame.f_locals['self'].__class__.__name__ else: for base in frame.f_locals['self'].__class__.__bases__: if func_name in base.__dict__: print base.__name__ break class A(object): def __init__(self): pass class B(A): def __init__(self): A.__init__(self) sys.settrace(mytrace) B() This will output: B B whereas I'm shooting for: B A Erik Jones Software Developer | Emma® [EMAIL PROTECTED] 800.595.4401 or 615.292.5888 615.292.0777 (fax) Emma helps organizations everywhere communicate & market in style. Visit us online at http://www.myemma.com -- http://mail.python.org/mailman/listinfo/python-list
Re: How to determine which method was used in an inheritance heirarchy?
On Jul 16, 7:18 am, Erik Jones <[EMAIL PROTECTED]> wrote: > On Jul 15, 2007, at 11:23 PM, Michele Simionato wrote: > > > On Jul 16, 5:51 am, Erik Jones <[EMAIL PROTECTED]> wrote: > >> Say you're given a call event frame for a method call. How can you > >> tell if the code being executed came from a super class of the object > >> or class the method was called on? > > >> Erik Jones > > > You look if the method was defined in self.__class__.__dict__. > > >Michele Simionato > > That doesn't seem to cover calling super class __init__ methods. > I am probably missing something. In the following code the method check_init checks if the current instance possess an __init__ or if it just inherits one from the ancestors. Is this what you want? class B(object): def __init__(self): 'something' def check_init(self): if '__init__' in self.__class__.__dict__: print 'possesses __init__' else: print 'inherits __init__' class C(B): 'something else' def __init__(self): print 'calling C.__init__' class D(B): pass c = C() d = D() c.check_init() #possesses __init__ d.check_init() #inherits __init__ -- http://mail.python.org/mailman/listinfo/python-list
Re: How to determine which method was used in an inheritance heirarchy?
On Jul 15, 2007, at 11:23 PM, Michele Simionato wrote: > On Jul 16, 5:51 am, Erik Jones <[EMAIL PROTECTED]> wrote: >> Say you're given a call event frame for a method call. How can you >> tell if the code being executed came from a super class of the object >> or class the method was called on? >> >> Erik Jones > > You look if the method was defined in self.__class__.__dict__. > >Michele Simionato That doesn't seem to cover calling super class __init__ methods. Erik Jones Software Developer | Emma® [EMAIL PROTECTED] 800.595.4401 or 615.292.5888 615.292.0777 (fax) Emma helps organizations everywhere communicate & market in style. Visit us online at http://www.myemma.com -- http://mail.python.org/mailman/listinfo/python-list
Re: How to determine which method was used in an inheritance heirarchy?
On Jul 16, 5:51 am, Erik Jones <[EMAIL PROTECTED]> wrote: > Say you're given a call event frame for a method call. How can you > tell if the code being executed came from a super class of the object > or class the method was called on? > > Erik Jones You look if the method was defined in self.__class__.__dict__. Michele Simionato -- http://mail.python.org/mailman/listinfo/python-list
How to determine which method was used in an inheritance heirarchy?
Say you're given a call event frame for a method call. How can you tell if the code being executed came from a super class of the object or class the method was called on? Erik Jones Software Developer | Emma® [EMAIL PROTECTED] 800.595.4401 or 615.292.5888 615.292.0777 (fax) Emma helps organizations everywhere communicate & market in style. Visit us online at http://www.myemma.com -- http://mail.python.org/mailman/listinfo/python-list
