python dictionaries access

Accessing Items

You can access the items of a dictionary by referring to its key name, inside

square brackets:

Example

Get the value of the "model" key:



thisdict = {

  "brand": "Ford",

  "model": "Mustang",

  "year": 1964

}x = thisdict["model"]



Try it Yourself »

Example

Get the value of the "model" key:

There is also a method called get() that will give you the same result:

Example

Get the value of the "model" key:



x = thisdict.get("model")



Try it Yourself »

Example

Get the value of the "model" key:

Get Keys

The keys() method will return a list of all the keys in the dictionary.

Example

Get a list of the keys:



x = thisdict.keys()

Try it Yourself »

Example

Get a list of the keys:

The list of the keys is a view of the dictionary, meaning that any

changes done to the dictionary will be reflected in the keys list.

Example

Add a new item to the original dictionary, and see that the keys list gets

updated as well:



car = {"brand": "Ford","model": "Mustang","year": 1964}

x = car.keys()print(x) #before the changecar["color"] =

"white"print(x) #after the change

Try it Yourself »

Example

Add a new item to the original dictionary, and see that the keys list gets

updated as well:

Get Values

The values() method will return a list of all the values in the dictionary.

Example

Get a list of the values:



x = thisdict.values()

Try it Yourself »

Example

Get a list of the values:

The list of the values is a view of the dictionary, meaning that any

changes done to the dictionary will be reflected in the values list.

Example

Make a change in the original dictionary, and see that the values list gets

updated as well:



car = {"brand": "Ford","model": "Mustang","year": 1964}

x = car.values()print(x) #before the changecar["year"]

= 2020print(x) #after the change

Try it Yourself »

Example

Make a change in the original dictionary, and see that the values list gets

updated as well:

Example

Add a new item to the original dictionary, and see that the values list gets

updated as well:



car = {"brand": "Ford","model": "Mustang","year": 1964}

x = car.values()print(x) #before the changecar["color"]

= "red"print(x) #after the change

Try it Yourself »

Example

Add a new item to the original dictionary, and see that the values list gets

updated as well:

Get Items

The items() method will return each item in a dictionary, as tuples in a list.

Example

Get a list of the key:value pairs



x = thisdict.items()

Try it Yourself »

Example

Get a list of the key:value pairs

The returned list is a view of the items of the dictionary, meaning that any

changes done to the dictionary will be reflected in the items list.

Example

Make a change in the original dictionary, and see that the items list gets

updated as well:



car = {"brand": "Ford","model": "Mustang","year": 1964}

x = car.items()print(x) #before the changecar["year"]

= 2020print(x) #after the change

Try it Yourself »

Example

Make a change in the original dictionary, and see that the items list gets

updated as well:

Example

Add a new item to the original dictionary, and see that the items list gets

updated as well:



car = {"brand": "Ford","model": "Mustang","year": 1964}

x = car.items()print(x) #before the changecar["color"]

= "red"print(x) #after the change

Try it Yourself »

Example

Add a new item to the original dictionary, and see that the items list gets

updated as well:

Check if Key Exists

To determine if a specified key is present in a dictionary use the in keyword:

Example

Check if "model" is present in the dictionary:



thisdict = {

  "brand": "Ford",

  "model": "Mustang",

  "year": 1964

}

if "model" in thisdict:  print("Yes, 'model' is

one of the keys in the thisdict dictionary")

Try it Yourself »

Example

Check if "model" is present in the dictionary: