[Python tutorial] 22. Dictionary methods

dictionary.clear()

Removes all the elements from the dictionary

car = {
  "brand": "Ford",
  "model": "Mustang",
  "year": 1964
}
car.clear()

dictionary.copy()

Returns a copy of the dictionary

car = {
  "brand": "Ford",
  "model": "Mustang",
  "year": 1964
}
x = car.copy()

dict.fromkeys(keys, value)

Returns a dictionary with the specified keys and value

x = ('key1', 'key2', 'key3')
y = 0
thisdict = dict.fromkeys(x, y)

dictionary.get(keyname, value)

Returns the value of the specified key

car = {
  "brand": "Ford",
  "model": "Mustang",
  "year": 1964
}
x = car.get("model")

dictionary.items()

Returns a list containing a tuple for each key value pair

car = {
  "brand": "Ford",
  "model": "Mustang",
  "year": 1964
}
x = car.items()

dictionary.keys()

Returns a list containing the dictionary's keys

car = {
  "brand": "Ford",
  "model": "Mustang",
  "year": 1964
}
x = car.keys()
print(x)

dictionary.pop(keyname, defaultvalue)

Removes the element with the specified key

car = {
  "brand": "Ford",
  "model": "Mustang",
  "year": 1964
}
car.pop("model")

dictionary.popitem()

Removes the last inserted key-value pair

car = {
  "brand": "Ford",
  "model": "Mustang",
  "year": 1964
}
car.popitem()

dictionary.setdefault(keyname, value)

Returns the value of the specified key. If the key does not exist: insert the key, with the specified value

car = {
  "brand": "Ford",
  "model": "Mustang",
  "year": 1964
}
x = car.setdefault("model", "Bronco")

dictionary.update(iterable)

Updates the dictionary with the specified key-value pairs

car = {
  "brand": "Ford",
  "model": "Mustang",
  "year": 1964
}
car.update({"color": "White"})

dictionary.values()

Returns a list of all the values in the dictionary

car = {
  "brand": "Ford",
  "model": "Mustang",
  "year": 1964
}
x = car.values()