Check if a key exist or not in a python dictionary

We can check it with "in" operator and "get()" method

In operator here returns the value True or False

For example


dictionary={"one":1, "two":2}

if "two" in dictionary:
	print("two exist in the dictionary")

The get() method returns the value if that key exists. If not exists it returns None


dictionary_data={"one":1, "two":2}

#Here the key three is not in the dictionary data so it will return None
key_value=dictionary_data.get("three")
print(key_value)

if key_value is not None:
	#As it returns None so it will not print anything
	print(key_value)





print("=============================")
# Two is in the dictionary data so it will return the value
key_value=dictionary_data.get("two")

print(key_value)

if key_value is not None:
	print(key_value)