Python Accessing elements of dictionary-all keys() all values() all items()

Python Accessing elements of dictionary-all keys() all values() all items() 

#Accessing elements of dictionary

emp={"empname":"krishna","jobdesc":"software programmer","salary":34000}

print(emp['empname'])    #access value using name

print(emp.get('salary')) #get key value using key name in get function

#get all keys and values

#keys(): return the list of all keys in present dictionary

#ex:

emp={"empname":"krishna","jobdesc":"software programmer","salary":34000}

print(emp.keys())

print(type(emp.keys()))

#values():return the list of all values in present dictionary

#ex:

emp={"empname":"krishna","jobdesc":"software programmer","salary":34000}

print(emp.values())

print(type(emp.values()))

#items():return all the items present in the dictionary. each item will be inside a tuple as a      key-value pair.

emp={"empname":"krishna","jobdesc":"software programmer","salary":34000}

print(emp.items())

print(type(emp.items()))

#Iterating a dictionary:

emp={"empname":"krishna","jobdesc":"software programmer","salary":34000}

for x in emp:

    print(x)

note:it will display only keys

emp={"empname":"krishna","jobdesc":"software programmer","salary":34000}

print('key', ':', 'value')

for key in emp:

    print(key, ':', emp[key])

# using items() method

print('key', ':', 'value')

for key_value in emp.items():

    print(key_value[0], key_value[1])

#find the length of the dictionary

emp={"empname":"krishna","jobdesc":"software programmer","salary":34000}

print(len(emp))

#adding new keys in dictionary 

emp={"empname":"krishna","jobdesc":"software programmer","salary":34000}

emp["empno"]=101 #single item adding

print(emp)

emp.update({"doj":"12/09/2022","company":"google"})

print(emp)

#python dictionary,#dictionary keys(),#dictionary values(),#dictionary items(),
#python datatypes,#python dict(),#dictionary accessing elements,#all keys(),#all vlaues(), #all items()

How to Creating a dictionary in Python datatypes-Python Dictionary and Dict

How to Creating a dictionary in Python datatypes 

three ways to create a dictionary.

Using curly brackets: The dictionaries are created by enclosing the comma-separated Key: Value pairs inside the {} curly brackets. The colon ‘:‘ is used to separate the key and value in a pair.

ex:

employee = {"empname": "raemsh", "jobdesc": "Software Developer", "salary":88000}

print(employee)

Using dict() constructor:  Create a dictionary by passing the comma-separated key: value pairs inside the dict().

ex:

emp=dict({"empname":"krishna","jobdesc":"Python Developer","salaru":120000})

print(emp)

Using sequence having each item as a pair (key-value)

ex:

emp=dict([("empname","ravikrishna"),("jobdesc","software developer"),("salary",130000)])

print(emp)

# create dictionary with value as a list

ex:

emp = {"empname": "mohan rao", "empnumber": [987, 654,3210]}

print(emp)

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