Python Dictionary - How to convert String dictionary to dictionary object

Published August 09, 2021

In this python example we are going to convert string object dictionary to dictionary object. To convert string to dictionary we are going to use below two ways

json.loads
ast.literal_eval

Now let's check how to use these two ways to convert dictionary

With json.loads:

loads() is a default method of JSON package will convert valid dictionary string to diction object

import json
stringA = '{"languages":["Python","Docker","Java","Flutter"]}'
# Given string dictionary
print("Given string : \n",stringA)
# using json.loads()
res = json.loads(stringA)
# Result
print("The converted dictionary : \n",res)

Output:

This will print below output

Given string : 
 {"languages":["Python","Docker","Java","Flutter"]}
The converted dictionary : 
 {'languages': ['Python', 'Docker', 'Java', 'Flutter']}

Parse dictionary object

Now if we want to print the languages from the given diction we will print by passing the languages key word.

print("Fetch languages from Dictionary: \n",res['languages'])

This will print below output

Fetch languages from Dictionary : 
 ['Python', 'Docker', 'Java', 'Flutter']

To print a specific language we need to pass the index of the

lng = res['languages']

for k in lng:
    print(k)

Output

Python
Docker
Java
Flutter

with ast.literal_eval

This method is from ast module, to use this we need to import the ast module

import ast
stringA = '{"languages":["Python","Docker","Java","Flutter"]}'
# Given string dictionary
print("Given string : \n",stringA)

res = ast.literal_eval(stringA)

# Result
print("The converted dictionary : \n",res)
print("Fetch languages from Dictionary : \n",res['languages'])

lng = res['languages']

for k in lng:
    print(k)

Output:

{'languages': ['Python', 'Docker', 'Java', 'Flutter']}
Fetch languages from Dictionary : 
 ['Python', 'Docker', 'Java', 'Flutter']
Python
Docker
Java
Flutter

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