A Python dictionary cannot have two keys with the name.

The method used to add a new key-value pair to a dictionary is ().

The function used to check if a key is present in a dictionary is ().

The method used to remove a key-value pair from a dictionary is ().

Dictionaries in Python are .

A key in a Python dictionary must be of a(n) type.

The method used to add a new key-value pair to a dictionary is ().