pprinting objects

[Martin Blume]

"Donn Ingle" schrieb
>  Is there a way to get a dump of the insides of an object?
> I thought pprint would do it.
>
print would actually like to do it if you told it how to do it.
print actually does it, but takes a default implementation if
you do not override __repr__ or __str__.

> If I had a class like this:
>
> class t:
>  def __init__(self):
>   self.x=1
>   self.y=2
>   self.obj = SomeOtherObj()
>
> Then it could display it as:
>
> <class> t,
>  x,1,
>  y,2,
>  obj,<class SomeOtherObj>
>
> Or something like that -- a complete output of the object really,
> with id()'s and so forth.
>
Define a __repr__ or __str__ method for the class:

class t:
 def __init__(self):
  self.x=1
  self.y=2
  self.obj = SomeOtherObj()

 def __repr__(self):
  s = "<class> %s\n  x,%d\n  y,%d\n  obj,<class %s>" \
       % (self.__class__, self.x, self.y, self.obj.__class__)
  return s

a_t = t()
print "a t obj: %s" % (a_t)


a t obj: <class> __main__.t
  x,1
  y,2
  obj,<class __main__.SomeOtherObj>


HTH
Martin