Python: Adding to dict of one object in a list changes all dicts of every other object in the list

Question

So Python isn\'t my strong suit and I\'ve encountered what I view to be a strange issue. I\'ve narrowed the problem down to a few lines of code, simplifying it to make askin

Answer 1

You define drugs as a class attribute, not an instance attribute. Because of that, you are always modifying the same object. You should instead define drugs in the __init__ method. I would also suggest using ruid as an argument:

class FinalRecord():
    def __init__(self, ruid):
        self.ruid = ruid
        self.drugs = {}

It could then be used as this:

fr = FinalRecord(7)
finalRecords.append(fr)
fr2 = FinalRecord(10)
finalRecords.append(fr2)

Or more simply:

finalRecords.append(FinalRecord(7))
finalRecords.append(FinalRecord(10))