The keys() function in python returns a view object that displays all the keys in the dictionary as a list.
dict.keys()
keys() doesn't take any parameters. when the dictionary is updated, it will reflect the keys for making those changes.
If we make any changes to the dictionary, it will reflect the view object also. If the dictionary is empty it returns an empty list.
| Input | Return Value |
|---|---|
| dictionary | View object |
persondet = {'name': 'Albert', 'age': 30, 'salary': 5000.0}
print(persondet.keys())
empty_dict
print(empty_dict.keys())
Output:
dict_keys(['name', 'salary', 'age']) dict_keys([])
persondet = {'name': 'Albert', 'age': 30, }
print('Before dictionary is updated')
keys = persondet.keys()
print(keys)
# adding an element to the dictionary
persondet.update({'salary': 5000.0})
print('\nAfter dictionary is updated')
print(keys)
Output:
Before dictionary is updated dict_keys(['name', 'age']) After dictionary is updated dict_keys(['name', 'age', 'salary'])
