Python Dictionary pop 1

Python Dictionary pop function

Python Dictionary pop function is used to remove an item at a given key position and prints the removed value. The syntax behind this is:

dictionary_name.pop(key, default_value)

Example

The pop function removes key-value pairs at a given key and prints the value.

myDict = {1: 'apple', 2: 'Banana' , 3: 'Orange', 4: 'Kiwi'}
print("Dictionary Items: ", myDict)

print("\nRemoved Item      :  ",  myDict.pop(3))
print("Dictionary Items  :  ",  myDict)

print("\nRemoved Item      :  ",  myDict.pop(1))
print("Dictionary Items  :  ",  myDict)
pop Example

In this program, we are trying to pop or remove a non-exiting Dictionary item. As you can see, Python is throwing an error.

myDict = {1: 'apple', 2: 'Banana' , 3: 'Orange', 4: 'Kiwi'}
print("Dictionary Items: ", myDict)

# Pop Non-existing Values
print("\nRemoved Item      :  ",  myDict.pop(5))
print("Dictionary Items  :  ",  myDict)
Dictionary Items:  {1: 'apple', 2: 'Banana', 3: 'Orange', 4: 'Kiwi'}
Traceback (most recent call last):
  File "/Users/suresh/Desktop/simple.py", line 5, in <module>
    print("\nRemoved Item      :  ",  myDict.pop(5))
KeyError: 5
>>>

In this program, we are using the second argument to display the default value. The below code returns Sorry!! No Item exits message if you are trying to remove the non-existing item from the dictionary.

myDict = {1: 'apple', 2: 'Banana' , 3: 'Orange', 4: 'Kiwi'}
print("Dictionary Items: ", myDict)

# Non-existing Values
print("\nRemoved Item      :  ",  myDict.pop(5, 'Sorry!! No Item exists'))
Dictionary Items:  {1: 'apple', 2: 'Banana', 3: 'Orange', 4: 'Kiwi'}

Removed Item      :   Sorry!! No Item exists