BasicOperation.md

Basic operation on dictionary

1. Add new key-value element in the dictionary

we can add key and value in a dictionary using the key.

Syntax:

dictname[key]=value

Example:

mydict={"name":"ravi","age":20}
mydict["bdate"]="26/01/1993"

print(mydict)

Output:

{"name":"ravi","age":20,"bdate":"26/01/1993"}

2. Updating value in dictionary

Syntax:

dictname[existed key]="new value"

Example:

mydict={"name":"ravi","age":20}
#update name with jhon

mydict["name"]="jhon"

print(mydict)

Output:

{"name":"jhon","age":20}

3. Removing key-value pair from the dictionary

use built in method pop() to remove element from dictionary

Syntax:

dictname.pop("keyname")

Example:

mydict={"name":"ravi","age":20}
#remove age
mydict.pop("age")

print(mydict)

Output:

{"name":"ravi"}

4. Clear all element of the dictionary

clear() is a built-in method used to empty the dictionary.

Syntax:

dictname.clear()

Example:

mydict={"name":"ravi","age":20}
#clear all element 
mydict.clear()

print(mydict)

Output:

{}

5. Deleting dictionary

del keyword used to delete complete dictionary.

Syntax:

del dictionary_name

Example

mydict={"name":"ravi","age":20}
del mydict
print(mydict)

Output:

NameError: name 'mydict' is not defined