How to create python dictionary?

Dictionary

Dictionaries are used to store data values in key:value pairs.

A dictionary is a collection which is unordered, changeable and does not allow duplicates.

Dictionaries are written with curly brackets, and have keys and values:

Create and print a dictionary:

thisdict = {
  "brand": "Ford",
  "model": "Mustang",
  "year": 1964
}
print(thisdict)

Dictionary Items

Dictionary items are unordered, changeable, and does not allow duplicates.

Dictionary items are presented in key:value pairs, and can be referred to by using the key name.

Print the "brand" value of the dictionary:

thisdict = {
  "brand": "Ford",
  "model": "Mustang",
  "year": 1964
}
print(thisdict["brand"])

When we say that dictionaries are unordered, it means that the items does not have a defined order, you cannot refer to an item by using an index.

Dictionaries are changeable, meaning that we can change, add or remove items after the dictionary has been created.

Duplicates Not Allowed

Dictionaries cannot have two items with the same key:

Duplicate values will overwrite existing values:

thisdict = {
  "brand": "Ford",
  "model": "Mustang",
  "year": 1964,
  "year": 2020
}
print(thisdict)

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Written by Jitender Kumar