hello,
I have a question about the pickler. I'm using it to save objects in a
program of mine that I can later reload to use. I was wondering how the pickle
works and how it references the class module when I unpickle the pickled
objects. for example I save some objects using the pickler, then I continue to
develop my program so the class module is changed and additional attributes and
methods are added. What happens now when I unpickle the pickled data and try to
operate on it using the new methods and new attributes?
here's an example if I didn't explain myself well...
I create a class of data called 'var'
class var:
def __init__(self):
self.data = numpy.array([1,2,3,4])
self.color = 'blue'
def operate(self):
return self.data+1
now create the instance:
myVariable = var()
I then pickle it to some file. and now I continue to develop my class module:
class var:
def __init__(self):
self.data = numpy.array([1,2,3,4])
self.color = 'blue'
self.name = 'bob'
def operate(self):
return self.data+1
def GetName(self):
return self.name
So now I unpickle my object from before using my new program. and I use
MyVar.GetName(). does this work? If not, how do people usually handle this type
of problem? or do they not use the pickler to save program data?
big thanks!
Jeff
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