On 3/11/2010 3:30 PM, T.J. Simmons wrote:
Hi all, got a question regarding serializing classes that I've
defined. I have some classes like
class Foo:
def __init__(self, x, y):
self.x = x, self.y = y
then a class that can contain multiple Foos, such as:
class Bar:
def __init__(self):
self.foos = [Foo(a, b), Foo(1, 2)]
While that's a gross oversimplification of the real structure (it gets
much, much more nested than that), that's a pretty decent overview.
The actual data for this is coming from a pseudo-XML file without any
actual structure, so I wrote a parser according to the spec given to
me, so I now have all the data in a series of classes I've defined,
with actual structure.
What I'm wanting to do is take this data I have and spit it out into
JSON, but I really don't see a good way (I'm new to Python, this is my
first real project with it).
I've defined a method in Foo, such as:
def toDict(self):
return dict(x = self.x, y = self.y)
but that obviously isn't going to work out like I hope when I try to
serialize Bar, with the multiple Foos.
Does anyone have a great way of doing this? This has been a pretty
much non-stop learning/codefest the past few days and I'm out of ideas
for this, which is the last part of the project.
Let me know if I can clarify in any way.
Thanks,
T.J.
Python has a JSON lib that may be what you want, alternatively you could
have a common base class with a method that iterates through its own
member variables (see dir() function) as key/value pairs, recursing when
it finds further instances of that base class (see isinstance()
function). That would let you iterate through all member variables in
the object hierarchy from the top level object, and do what you wish
with them. I'm sure there are other ways too.
Cheers, JB
--
http://mail.python.org/mailman/listinfo/python-list
