George Sakkis wrote: > tom arnall wrote: >> >object data member dumper? >> >George Sakkis george.sakkis at gmail.com >> >Wed Nov 8 03:42:47 CET 2006 >> >> > tom arnall wrote: >> > >> > > Bruno Desthuilliers wrote: >> > > >> > > > tom arnall a écrit : >> > > >> does anyone know of a utility to do a recursive dump of object >> > > >> data members? >> > > >> >> > > > >> > > > What are "object data members" ? (hint: in Python, everything is an >> > > > object - even functions and methods). >> > > > >> > > > What is your real use case ? >> > > >> > > something like: >> > > >> > > class A: >> > > def __init__(self, p1): >> > > self.p1 = p1 >> > > >> > > class B: >> > > def __init__(self,p1, p2): >> > > self.a = A(p1) >> > > self.p2 = p2 >> > > self.v1 = '3' >> > > >> > > class C: >> > > def __init__(self): >> > > self.b = B(3,4) >> > > self.p3 = 5 >> > > >> > > class D: >> > > def __init__(self): >> > > self.v2=2 >> > > self.o1 = C() >> > > self.o2 = B(11,12) >> > > >> > > >> > > d = D() >> > > objectDataDumper(d) >> > > >> > > >> > > would produce something like: >> > > >> > > object of class D with: >> > > o1(C)->b(B)->a(A)->p1=3 >> > > o1(C)->b(B)->p2=4 >> > > o1(C)->b(B)->v1=3 >> > > o1(C)->p3=5 >> > > o2(B)->a(A)->p1=11 >> > > o2(B)->p2=12 >> > > o2(B)->v1=3 >> > > v2=2 >> > > >> > > >> > > tom arnall >> > > north spit, ca >> > > usa >> > >> > At first I thought pickle would be what you're looking for, because >> > that's exactly what it does; it dumps arbitrary objects, without >> > choking on recursive references. Only problem is, it's not human >> > readable (even in its ascii form).If you want it to be human readable, >> > you may check the gnosis.xml.pickle module >> > (http://cheeseshop.python.org/pypi/Gnosis_Utils/1.2.1-a). That's the >> > output of gnosis.xml.pickle.XML_Pickler(d).dumps() on your example: >> > >> > <?xml version="1.0"?> >> > <!DOCTYPE PyObject SYSTEM "PyObjects.dtd"> >> > <PyObject module="__main__" class="D" id="-1210610740"> >> > <attr name="v2" type="numeric" value="2" /> >> > <attr name="o2" type="PyObject" id="-1211043316" module="__main__" >> > class="B"> >> > <attr name="a" type="PyObject" id="-1211043220" module="__main__" >> > class="A"> >> > <attr name="p1" type="numeric" value="11" /> >> > </attr> >> > <attr name="p2" type="numeric" value="12" /> >> > <attr name="v1" type="string" value="3" /> >> > </attr> >> > <attr name="o1" type="PyObject" id="-1211199412" module="__main__" >> > class="C"> >> > <attr name="p3" type="numeric" value="5" /> >> > <attr name="b" type="PyObject" id="-1211082644" module="__main__" >> > class="B"> >> > <attr name="a" type="PyObject" id="-1211067156" module="__main__" >> > class="A"> >> > <attr name="p1" type="numeric" value="3" /> >> > </attr> >> > <attr name="p2" type="numeric" value="4" /> >> > <attr name="v1" type="string" value="3" /> >> > </attr> >> > </attr> >> > </PyObject> >> > >> > >> > I've also written a similar but less verbose xml dumper. The gnosis.xml >> > package provides a bidirectional mapping between objects and xml >> > (objects -> xml and xml->object) and therefore has to be precise; mine >> > simply generates a nice xml dump of the object which isn't necessarily >> > reversible. Here's the output for your example: >> > >> > <root type="__main__.D"> >> > <o1 type="__main__.C"> >> > <b type="__main__.B"> >> > <a type="__main__.A"> >> > <p1 type="int">3</p1> >> > </a> >> > <p2 type="int">4</p2> >> > <v1 type="str">3</v1> >> > </b> >> > <p3 type="int">5</p3> >> > </o1> >> > <o2 type="__main__.B"> >> > <a type="__main__.A"> >> > <p1 type="int">11</p1> >> > </a> >> > <p2 type="int">12</p2> >> > <v1 type="str">3</v1> >> > </o2> >> > <v2 type="int">2</v2> >> > </root> >> > >> > >> > If you find it suits you better, I'll try to make it available >> > somewhere (probably in the cookbook). >> > >> > George >> > >> >> >> George, >> >> did you ever put up your object dumper on the net? > > Here it is: http://rafb.net/paste/results/C0NHBp27.html > Mostly undocumented but works for most common types. Most methods are > overridable so you can customize the dumping for a specific type (or > types) in a subclass. >
Superb! Thanks very much. tom arnall north spit, ca usa Make cyberspace pretty: stamp out curly brackets and semicolons. Loosen up: the tests extend the compiler. -- Posted via a free Usenet account from http://www.teranews.com -- http://mail.python.org/mailman/listinfo/python-list
