Python - How to Lookup Dictionary by Key

Here's Python Dictionary that explained how to lookup it using Key. Dictionary in Python is Key/Value pair. It's different from the list. The basic rule to identify; is enclosed in flower brackets ({}). Here's a demo about lookup and how to test it. 

Dictionary = { 'key' : 'value', 'key: value'  }  

IN THIS PAGE

1. Python Dictionary
2. Python Lookup
3. How to check Lookup working or not

Dictionary

Example

my_dict = {'name' : 'srini' , 'salary' : '100000', 'skills' : 'python' }

Here, 'name' is the label.

Then, :

Then, 'srini' -> Value

Explanation

• Data is enclosed in flower brackets
• It's an unordered list
• You can manipulate data (mutable)
• You can access the value of a particular key. So, in Python, it's called a Lookup. It's one of the best interview questions.

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Lookup Dictionary by Key

Python Lookup (a.k.a Dictionary). You can access data quickly. It's really super-speed. 

my_dict['name']

The result will be: 'srini'

• You should use square brackets ([]) to get lookup data
• Use key-value in square brackets ([]) with a single quote, you will get value

Output from Lookup

I am now adding new value to the Lookup.

>>> my_dict['role'] = 'Manager'

Now, the my_dict will'be :

>>> my_dict = {'name' : 'srini' , 'salary' : '100000', 'skills' : 'python' , 'role' : 'Manager'}

• The order of assignmenet will not match with actula storing in Python
• The order of Key/Value storage is taken care by interpreter

References

• Python Docs All About Dictionary