What does key mean in python

The key in Python is the key in the Python dictionary.

Dictionary is another mutable container model and can store any type of object.

Each key=>value pair in the dictionary is separated by colon :, and each key-value pair is separated by comma,. The entire dictionary is included in curly braces {}. The format is as follows:

d = {key1 : value1, key2 : value2 }

The key is generally unique. If the last key-value pair is repeated, the previous one will be replaced. The value does not need to be unique.

>>>dict = {'a': 1, 'b': 2, 'b': '3'} 
>>> dict['b']'3'
>>> dict{'a': 1, 'b': '3'}

The value can be of any data type, but the key must be immutable, such as string, number or tuple.

A simple dictionary example:

dict = {'Alice': '2341', 'Beth': '9102', 'Cecil': '3258'}

You can also create a dictionary like this:

dict1 = { 'abc': 456 }
dict2 = { 'abc': 123, 98.6: 37 }

Output key value:

#!/usr/bin/python 
dict = {'Name': 'Zara', 'Age': 7, 'Class': 'First'}
print "dict['Name']: ", dict['Name']
print "dict['Age']: ", dict['Age']

dict['Name']:  Zara
dict['Age']:  7

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