Python Program to check if a Given key exists in a Dictionary

Write a Python Program to check if a given key exists in a Dictionary with a practical example.

Python Program to check if a given key exists in a Dictionary Example

In this program, we are using the if statement and keys function to check whether the key exists in this Dictionary or not. If true, it prints the Key Value.

myDict = {'a': 'apple', 'b': 'Banana' , 'o': 'Orange', 'm': 'Mango'}
print("Dictionary : ", myDict)

key = input("Please enter the Key you want to search for: ")

# Check Whether the Given key exists in a Dictionary or Not
if key in myDict.keys():
    print("\nKey Exists in this Dictionary")
    print("Key = ", key, " and Value = ", myDict[key])
else:
    print("\nKey Does not Exists in this Dictionary")

Python Program to verify Given key exists in a Dictionary Example 2

This program is another approach to checking whether the given key is present in a dictionary or not.

myDict = {'a': 'apple', 'b': 'Banana' , 'o': 'Orange', 'm': 'Mango'}
print("Dictionary : ", myDict)

key = input("Please enter the Key you want to search for: ")

# Check Whether the Given key exists in a Dictionary or Not
if key in myDict:
    print("\nKey Exists in this Dictionary")
    print("Key = ", key, " and Value = ", myDict[key])
else:
    print("\nKey Does not Exists in this Dictionary")

Dictionary :  {'a': 'apple', 'b': 'Banana', 'o': 'Orange', 'm': 'Mango'}
Please enter the Key you want to search for: m

Key Exists in this Dictionary
Key =  m  and Value =  Mango
>>> 
Dictionary :  {'a': 'apple', 'b': 'Banana', 'o': 'Orange', 'm': 'Mango'}
Please enter the Key you want to search for: g

Key Does not Exists in this Dictionary
>>> 

Example 3

In this python program, we are using the get function to check whether the Python key exists or not.

myDict = {'a': 'apple', 'b': 'Banana' , 'o': 'Orange', 'm': 'Mango'}
print("Dictionary : ", myDict)

key = input("Please enter the Key you want to search for: ")

# Check Whether the Given key exists in a Dictionary or Not
if myDict.get(key) != None:
    print("\nKey Exists in this Dictionary")
    print("Key = ", key, " and Value = ", myDict[key])
else:
    print("\nKey Does not Exists in this Dictionary")

Dictionary :  {'a': 'apple', 'b': 'Banana', 'o': 'Orange', 'm': 'Mango'}
Please enter the Key you want to search for: a

Key Exists in this Dictionary
Key =  a  and Value =  apple
>>> 
Dictionary :  {'a': 'apple', 'b': 'Banana', 'o': 'Orange', 'm': 'Mango'}
Please enter the Key you want to search for: x

Key Does not Exists in this Dictionary
>>>