Dictionaries are very powerful structures and are widely used in Python. A dictionary is a key-value pair structure. A dictionary key can be a unique number or string, and the value can be any Python object. Dictionaries are mutable and can be changed in place. The following example demonstrates the basics of dictionaries in Python:
A Python dictionary can be declared within curly braces. Each key value pair is separated by a comma. It should be noted that the keys have to be unique; if we try to repeat the keys, the old key value pair is overwritten by the new one. From the preceding example, we can establish that the ...
