d14.py

d1 = {'name': 'karthi',
      'age': 7,
      'city': 'chennai',
      }

# popitem
# The popitem() method removes and returns the last element (key, value) pair inserted into the dictionary.
print(d1.popitem())  # Output:('city', 'chennai')
print (type(d1.popitem()))#Output:<class 'tuple'>
print(d1)  # Output:{'name': 'karthi', 'age': 7}


# pop
# pop() method removes and returns a value from a dictionary for  the given key.
print(d1.pop('name'))  # Output:Karthi
print(d1)  # Output: {'age': 7}


# If key is not in dictionary and value is given as default argument means,it will return the default value.
print(d1.pop("city", "Not found"))  # Output: Not found


# if key is not in dictionary  and default value not given means it will raise KeyError
# print (d1.pop('rollno')) #Output: KeyError: 'rollno'