Exists?

values() to find an entry

Use .values() to find the presence of an entry in a dictionary.

d = {'1': 'one', '3': 'three', '2': 'two', '5': 'five', '4': 'four'}

'one' in d.values() # True

.get() for graceful error handling

Return the value for key if the key is in the dictionary, else defaultValue.

If defaultValue is not given, it defaults to None.

• Using this method never raises a KeyError.

dict.get(key[, defaultValue])