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How the keys() method works in Python

Hassan Ahmed

The inbuilt keys() method in Python is used to return a view object that contains all the keys of a dictionary in a list.

A view object gives a dynamic view of the dictionary. Whenever the dictionary is altered, the view object will mirror those alterations.

Syntax

dict.keys()

Parameters

This method does not require any parameters.

Code

Example 1

postcodes = {'griffith':2603, 'belconnen':2617, 'phillip':2606}
x = postcodes.keys()

print(x)

Example 2

#This example represents how the returned 
#view object is dynamic 

postcodes = {'griffith':2603, 'belconnen':2617, 'phillip':2606}
x = postcodes.keys()

postcodes.update({'civic': 2601})

print(x)

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python
keys()
dictionary
communitycreator
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