<human>:  Python code to json to pure string.
<bot>: 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.