PYTHON DICTIONARIES

D
ICTIONARIES
thisdict = {
  "brand": "Ford",
  "electric": False,
  "year": 1964,
  "colors": ["red", "white", "blue"],
  "type": {
    "A1" : "21 Lac",
    "A2" : "23Lac",
    "A3" : "25Lac",
  }
  }
print(thisdict)

{'brand': 'Ford', 'electric': False, 'year': 1964, 'colors': ['red', 'white', 'blue'], 'type': {'A1': '21 Lac', 'A2': '23Lac', 'A3': '25Lac'}}

print(type(thisdict))

<class 'dict'>

print(len(thisdict))

5

Access,Add,Change Items
car = {
"brand": "Ford",
"model": "Mustang",
"year": 1964
}
x = car.keys()
print(x) before the change

dict_keys(['brand', 'model', 'year'])

car["color"] = "white" If color key is not in it,it will be added in disc.
car.update({"year": 2020})
print(x) After the change

dict_keys(['brand', 'model', 'year', 'color'])

print(type(x))

<class 'dict_keys'>

print(type(car.get("model")),car.get("model"))

<class 'str'> Mustang

print(type(car.values()),car.values())

<class 'dict_values'> dict_values(['Ford', 'Mustang', 2020, 'white'])

print(type(car.items()),car.items())

<class 'dict_items'> dict_items([('brand', 'Ford'), ('model', 'Mustang'), ('year', 2020), ('color', 'white')])

if "model" in car:
  print("Yes, 'model' is one of the keys in the thisdict dictionary")

Yes, 'model' is one of the keys in the thisdict dictionary

Remove Items
car.pop("year") The pop() method removes the item with the specified key name:
thisdict.popitem() The popitem() method removes the last inserted item
del car["model"] The del keyword removes the item with the specified key name:
print(car)

{'brand': 'Ford', 'color': 'white'}

car.clear() The clear() method empties the dictionary:
Loop Dictionaries
for x in car:
  print(x) to key name
  print(car[x]) to key value

brand
Ford
color
white

For x in thisdict.values(): You can also use the values() method to return values of a dictionary:
For x in thisdict.keys(): You can use the keys() method to return the keys of a dictionary:
For x, y in thisdict.items(): Loop through both keys and values, by using the items() method:

Copy Dictionaries
mydict = car
mydict = car.copy()
mydict = dict(thisdict)
myfamily = {
  "disc1" : thisdict,
  "disc2" : {
    "name" : "Linus",
    "year" : 2011
  }
 }
print(myfamily)

{'disc1': {'brand': 'Ford', 'electric': False, 'year': 1964, 'colors': ['red', 'white', 'blue']}, 'disc2': {'name': 'Linus', 'year': 2011}}