This dictionary is a collection of key-value pairs. Keys are used to identify the values; each key must be unique. Values can be any object, including numbers, strings, lists, and other dictionaries. Dictionaries are created using curly braces ({}). To add a key-value pair to a dictionary, you use the colon (:). For example, the following code creates a dictionary with key-value pairs:
Python
# create dictionary
dictContact = {
"Jan": "554-3432",
"mike": "534-2332",
"sarah": "154-3233",
}
print(dictContact)
# output {'Jan': 554-3432, 'mike': 534-2332, 'sarah': 154-3233}
print(dictContact.keys())
# output dict_keys(['name', 'year', 'rating', 'actors'])
print(dictContact.values())
# add new key value pair
dictContact["john"] = "123-4567"
print(dictContact)
# output {'Jan': 554-3432, 'mike': 534-2332, 'sarah': 154-3233, 'john': 123-4567}
# delete key value pair
del dictContact["john"]
print(dictContact)
# output {'Jan': 554-3432, 'mike': 534-2332, 'sarah': 154-3233}
# update key value pair
dictContact["Jan"] = "123-4567" # update Jan's phone number
print(dictContact)
# output {'Jan': 123-4567, 'mike': 534-2332, 'sarah': 154-3233}
# get value of a key
print(dictContact["Jan"]) # output 123-4567
