构建python字典类

Question

I'm trying to write a hashing class where you can add and see if the item exists using Python's built-in dictionary. I tried this but seems to ignore the put method, but it is possible to check for existing item. Can anyone help me?

class Hashtable (object):
    def __init__(self):
        atom={}
        self.atom=atom

    def put(self ,name ,number):
        atom={}
        self.atom=atom
        self.name=name
        self.number=number
        self.atom[self.name]= self.number

    def get(self ,name):
        return self.atom[name]

    def __str__ (self):
        keysstring =str(self.atom[self.name])
        return keysstring

Answer 1

In your put method, you assign a new empty dictionary to self.atom , erasing whatever was already stored there. Just do this:

def put(self, name, number):
    self.atom[name] = number

There's no need to assign name and number to self.name and self.number , since they will also be overwritten every time you call put .