Python dictionary clear() usage and example

Python dictionary methods

The clear() method removes all items from the dictionary.

The syntax of clear() is:

dict.clear()

clear() parameters

clear() method without any parameters

clear() return value

The clear() method does not return any value (returns None).

Example1How does the clear() method work for dictionaries?

d = {1: 'one',　2: 'two'
d.clear()
print('d =', d)

When running the program, the output is:

d = {}

You can also remove all elements from the dictionary by assigning an empty dictionary {}.

However, if there are other variables referencing the dictionary, there is a difference between calling clear() and assigning {}.

d = {1: 'one',　2: 'two'
d1　= d
d.clear()
print('Delete items using clear()')
print('d =', d)
print('d1　=', d1)
d = {1: 'one',　2: 'two'
d1　= d
d = {}
print('Delete items by allocation {}')
print('d =', d)
print('d1　=', d1)

When running the program, the output is:

Delete items using clear()
d = {}
d1　= {}
Delete items by allocation {}
d = {}
d1　= {1: 'one',　2: 'two'

Python dictionary methods