Python Dictionary - in method

Membership operator - "in":

The in operator called on a dictionary instance tests whether a given key is contained in a dictionary.
If the value is present in the sequence it returns True. It returns False otherwise.

Example 1:

# Example Python program that uses
# the membership in operator on a dictionary
environmentDictionary = {'path': '/bin:/opt/bin'}

if 'path' in environmentDictionary:
   print('Path is set');
else:
   print('Path is not set');

Output:

Path is set

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