Cheatography
https://cheatography.com
DictionaryA dictionary is changeable and indexed like a list and unordred like a set. A dictionairy contains keys and values. |
Dictionary exampleCar = {
"brand": "Ford",
"model": "Focus",
"year": 2013
}
print(Car)
>>>{'brand': 'Ford', 'model': 'Focus', 'year': 2013}
|
The dict() Constructorthisdict = dict(brand="Ford", model="Focus", year=2013)
|
Accessing ItemsExample 1
x = Car["model"]
Example 2
x = Car.get("model") |
Check if Key ExistsCheck if "year" is present in the dictionary:
if "year" in Car:
print("Yes, 'year' is one of the keys in the Car dictionary") |
Adding ItemsCar["Combined MPG"] = 32
|
| | Removing ItemsCar.pop("year")
| The pop() method removes the item with the specified key name | Car.popitem()
| The popitem() method removes the last inserted item | del Car["year"]
| The del keyword removes the item with the specified key name |
Delete a Dictionarydel Car
print(Cars) #this will cause an error because "Cars" no longer exists.
|
Return an Empty Dictionary
Copy a DictionaryExample 1
CarCopy = Car.copy()
Example 2
CarCopy = dict(Car) |
| | Nested DictionariesCars = {
"Car1":{
"brand":"Ford",
"model":"Focus"
},
"Car2":{
"brand":"Fiat",
"model":"Punto"
}
}
| Create a nested dictionary from two existing dictionairies. | Car1 = {
"brand": "Ford",
"model": "Focus"
}
Car2 = {
"brand": "Fiat",
"model": "Punto"
}
Cars = {
"Car1": Car1,
"Car2": Car2
}
|
|
Help Us Go Positive!
We offset our carbon usage with Ecologi. Click the link below to help us!
Created By
Metadata
Favourited By
Comments
No comments yet. Add yours below!
Add a Comment
Related Cheat Sheets
More Cheat Sheets by Nouha_Thabet