How do we define dictionary in Python?

Dictionary object is an unordered collection of key-value pairs, separated by comma and enclosed in curly brackets. Association of value with key is marked by : symbol between them.

>>> D1={'a':1,'b':2,'c':3}

Key can appear in a dictionary object only once, whereas single value can be assigned to multiple keys. Key should be of immutable data type i.e. number, string or tuple.

>>> D2={1:'aaa', 2:'bbb', 3:'ccc'}
>>> D3={(10,10):'x1', (20,20):'x2'}
>>> D4={'Microsoft':['MS Office', 'Windows', 'C#'], 'Oracle':['Oracle', 'Java', 'MySQL']}

Pythonista

Updated on 25-Feb-2020 11:23:19

• Related Questions & Answers
• How do we define tuple in Python?
• How do we define lists in Python?
• How to define a Python dictionary within dictionary?
• How do we define a dialog box in HTML?
• How do Python Dictionary Searching works?
• How do Python dictionary hash lookups work?
• How do we use function literal to define a function in JavaScript?
• How do we define an area in an image map with HTML?
• How we can translate Python dictionary into C++?
• How can we read Python dictionary using C++?
• How can we define a Python function at runtime?
• How do we use enum keyword to define a variable type in C#?
• How do we compare Python Dates?
• How do we declare variable in Python?
• How do we provide comments in Python?