human
json to pure string.
assistant
Here is a Python code to convert a string to a pure string

import json

def json_to_string(json_string):
    """Convert json to pure string.

    :param str json_string:
    :rtype: str
    :return:
    """
    return json.dumps(json_string)

# Enter the json string
json_string = {"a": "b"}

# Calling the function
print((json_to_string(json_string)))

#Example Output
# {"a": "b"}

#Remember to inspect code for bugs.