getattr lookup fails for instance of class python

Question

I'm doing an exercise in which you're supposed to calculate a score of how classy your items are. A tophat gives you 2 points, a bowtie gives you 4 points and a monocle gives you 5 points. I've initiated a dictionary with these items on each class instance, yet when I use getattr to check if the item has the attribute it always returns None.

class Classy(object):

    def __init__(self):
        self.items = []
        self.classyItems = {'tophat': 2, 'bowtie': 4, 'monocle': 5}

    def addItem(self, str):
      self.items.append(str)

    def getClassiness(self):
      classiness = 0
      for item in self.items:
        itemIsClassy = getattr(self.classyItems, item, None) # Why does this always return none?
        if itemIsClassy:
          classiness += itemIsClassy
        else:
          pass
      return classiness


# Test cases
me = Classy()

# Should be 0
print me.getClassiness()

me.addItem("tophat")
# Should be 2
print me.getClassiness() # I'm getting 0

Why is getattr returning None when self.classyItems clearly has the attribute of tophat?

Thanks for the help everyone! I was still confused after reading the answer and simply reading that dictionary keys are not attributes here helped me. Is Python dict an Object?

Answer 1

getattr accesses attributes and/or methods, but classyItems is a dict which doesn't have any (visible) attributes¹ and stores its contents as key-value pairs².

In your case you should use dict.get instead of getattr, more specifically self.classyItems.get(item, None), to access the values with default.

¹Dictionaries have methods that could be accessed using getattr though.

²That's why you access them using d[key] instead of d.key.