Python Dictionary - in operator

Membership operator - "in":

The in operator called on a dictionary instance tests whether a given key is present in a dictionary.
If the value is present in the sequence it returns True. It returns False otherwise.
The behaviour of in operator is the opposite of the not in operator.

Example 1:

# Example Python program that finds
# whether an element is present in a dictionary
# using the "in" operator
d1 = {"if":1, "else":2, "for":3, "while":4}
token     = "switch"
if token in d1:
    print("Token with value \"%s\" is found"%token)
else:
    print("Token with value \"%s\" is not found"%token)

Output:

Token with value "switch" is not found

Example 2:

# Example Python program that checks
# the presence of a key in a dictionary
# element

fruitPrices = {"Apples":1.42,
                "Oranges":1.33,
                "Kiwi":2.54,
                "Avocados":6.1,
                "Strawberries":1.7};

fruit2Lookup = "Grapes";

if fruit2Lookup in fruitPrices:
   print("Yes, %s are available"%fruit2Lookup);
else:
   print("%s not available"%fruit2Lookup);

Output:

Grapes not available