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Python Dictionary update() method
Dictionary in Python is an unordered collection of data values, used to store data values like a map, which unlike other Data Types that hold only single value as an element, Dictionary holds key : value pair.
In Python Dictionary, update() method updates the dictionary with the elements from the another dictionary object or from an iterable of key/value pairs.
Syntax: dict.update([other])
Parameters: This method takes either a dictionary or an iterable object of key/value pairs (generally tuples) as parameters.
Returns: It doesn’t return any value but updates the Dictionary with elements from a dictionary object or an iterable object of key/value pairs.
Example #1: Update with another Dictionary.
# Python program to show working# of update() method in Dictionary # Dictionary with three items Dictionary1 = { 'A': 'Geeks', 'B': 'For', }Dictionary2 = { 'B': 'Geeks' } # Dictionary before Updationprint("Original Dictionary:")print(Dictionary1) # update the value of key 'B'Dictionary1.update(Dictionary2)print("Dictionary after updation:")print(Dictionary1) |
Output:
Original Dictionary:
{'A': 'Geeks', 'B': 'For'}
Dictionary after updation:
{'A': 'Geeks', 'B': 'Geeks'}
Example #2: Update with an iterable.
# Python program to show working# of update() method in Dictionary # Dictionary with single item Dictionary1 = { 'A': 'Geeks'} # Dictionary before Updationprint("Original Dictionary:")print(Dictionary1) # update the Dictionary with iterableDictionary1.update(B = 'For', C = 'Geeks')print("Dictionary after updation:")print(Dictionary1) |
Output:
Original Dictionary:
{'A': 'Geeks'}
Dictionary after updation:
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