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HOW TO CREATE DICTIONARY COMPREHENSION:
Sulochana Kamshetty
3 years ago
Table of Content
- What is DICTIONARY COMPREHENSION?
- Create dictionary with different ways using different data types
- Output
- Second method creating simple dictionary
- Output
- Explanation
Let's understand
What is DICTIONARY COMPREHENSION?
Where
and when it’s used in our python programming language?
In
this article, we will also understand, about the concept as well as coding part
in python with the help of some examples.
So Dictionaries are data types in Python which allows us to
store data in key/value pair
Coding
part with Example Dictionaries (or dict in Python) is a way of storing elements just
like you would in a Python list.
Lets understand first about what is dictionaries how
its created with coding in python
Create dictionary with different ways using different
data types
Our first and
simple dictionary is creating an empty dictionary
>>> empty = {}
>>> empty
{}Output:- Empty Dictionary: {}
Use of empty list: empty
list is created for if u want to create any dictionary in between of any
program it can be used in emergency case without disturbing the whole program
Second method creating simple dictionary:-
My_dict= {
"brand": "Ford",
"model": "Mustang",
"year": 1964
}
print(my_dict)Output:-
{'brand': 'Ford', 'model': 'Mustang', 'year': 1964}Explanation:-
Step 1:- Created variable called my_dict with a list of
items into it with the different data types those are using numerical values
and using characters into it after executing with the output using print
function received the output in the form of a dictionary.
Let us understand how to
create dictionary comprehension
Like List Comprehension, Python allows
dictionary comprehensions. We can create dictionaries using simple expressions.
Lists to represent keys and values:-
keys = ['a','b','c','d','e']
values = [1,2,3,4,5]
# but this line shows dictionary comprehension
here
My_Dict = { k:v for (k,v) in zip(keys, values)}
# We can use below too
# my_Dict = dict(zip(keys, values))
print (my_Dict) Output :
{'a': 1, 'b': 2, 'c': 3, 'd': 4, 'e': 5}Explanation:-
Creating
dictionary comprehension creating a new variable with the name with a list of keys
and values into it and also using zip function in dictionary comprehension has
concatenated two different datasets with one dictionary or set of values
extracting the first value from the first variable and the first value of the second
variable.
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