Dictionary
A dictionary is a collection which is unordered, changeable and indexed. In Python dictionaries are written with curly brackets, and they have keys and values.
Example
Create and print a dictionary:
thisdict = { "brand": "Ford", "model": "Mustang", "year": 1964 } print(thisdict)
Output
Accessing Items
You can access the items of a dictionary by referring to its key name:
Example
Get the value of the “model” key:
x = thisdict["model"]
Output
Change Values
You can change the value of a specific item by referring to its key name:
Example
Change the “year” to 2018:
thisdict = { "brand": "Ford", "model": "Mustang", "year": 1964 } thisdict["year"] = 2018
Output
Loop Through a Dictionary
You can loop through a dictionary by using a for loop.
When looping through a dictionary, the return value are the keys of the dictionary, but there are methods to return the values as well.
Example
Print all key names in the dictionary, one by one:
for x in thisdict: print(x)
Output
Example
Print all values in the dictionary, one by one:
for x in thisdict: print(thisdict[x])
Output
