Operations on Dictionary in Python

Below is declaration of Dictionary on which we shall explain some of the operations that can performed:

name = {1:"TalentEve",2:"Embeddeddesignblog",3:"YouTube-Way2Know",4:"Myvision-thisworld"}

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Accessing the elements of Dictionary

name = {1:"TalentEve",2:"Embeddeddesignblog",3:"YouTube-Way2Know",4:"Myvision-thisworld"}

#Items in dcitionary are accessed using keys

print(name[2])

The output is:

Embeddeddesignblog

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Finding the length of Dictionary

name = {1:"TalentEve",2:"Embeddeddesignblog",3:"YouTube-Way2Know",4:"Myvision-thisworld"}

print(len(name))

The output is 

4 

as there are 4 items in the dictionary

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Finding the maximum value of the dictionary

name = {1:"TalentEve",2:"Embeddeddesignblog",3:"YouTube-Way2Know",4:"Myvision-thisworld"}

#Maximum shall be determined from the key and not items

print(max(name))

The above print output 

4 

as 4 is the maximum key number in the dictionary

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Finding the minimum value of the dictionary

#Maximum shall be determined from the key and not items

print(min(name))

#The above print output 

1 

as 1 is the minimum key number in the dictionary

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Updating the item using key

name = {1:"TalentEve",2:"Embeddeddesignblog",3:"YouTube-Way2Know",4:"Myvision-thisworld"}

name[1] = "forum.talenteve.com"

print(name)

#The output is now

{1: 'forum.talenteve.com', 2: 'Embeddeddesignblog', 3: 'YouTube-Way2Know', 4: 'Myvision-thisworld'}

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Adding new item to dictionary

name = {1:"TalentEve",2:"Embeddeddesignblog",3:"YouTube-Way2Know",4:"Myvision-thisworld"}

#Adding new item to dictionary

name[5] = "forum.talenteve.com"

print(name)

#The output is

{1: 'TalentEve', 2: 'Embeddeddesignblog', 3: 'YouTube-Way2Know', 4: 'Myvision-thisworld', 5: 'forum.talenteve.com'}

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Converting Dictionary to string

{1: 'TalentEve', 2: 'Embeddeddesignblog', 3: 'YouTube-Way2Know', 4: 'Myvision-thisworld', 5: 'forum.talenteve.com'}

#converting dictionary to string

print(str(name))

#The output shall be string

{1: 'TalentEve', 2: 'Embeddeddesignblog', 3: 'YouTube-Way2Know', 4: 'Myvision-thisworld', 5: 'forum.talenteve.com'}

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Deleting an element in Dictionary

name = {1:"TalentEve",2:"Embeddeddesignblog",3:"YouTube-Way2Know",4:"Myvision-thisworld"}

#deleting an element in dictionary

del name[1]

print(name)

#The output from above print shall be:

{2: 'Embeddeddesignblog', 3: 'YouTube-Way2Know', 4: 'Myvision-thisworld'}

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Deleting dictionary

#deleting entire dictionary

del name

print(name)

#The output from above print shall be:

NameError: name 'name' is not defined

#NameError is output as the dictionary is deleted

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Clearing a Dictionary

Contents of a dictionary can be cleared using the clear() function

name = {1:"TalentEve",2:"Embeddeddesignblog",3:"YouTube-Way2Know",4:"Myvision-thisworld",5:"TalentEve"}

print(name.clear())

The output of above code shall be:

None

It is None as there are no contents in Dictionary