Python replace placeholders in json

json_replace_placeholders.py

import re

def replace_json_placeholders(json, values):
  # find all placeholders
  placeholders = re.findall('<[\w ]+>', json)
  # clear_placeholders = list(map(lambda x: x.replace('<', '').replace('>', ''), placeholders))

  assert len(placeholders) == len(values), "Please enter the values of all placeholders."

  # replaces all placeholders with values
  for k, v in values.items():
      placeholder = "<%s>" % k
      json = json.replace(placeholder, v)

  return json
      
      
#Example
json = "{'firstName':'<first_name>','lastName':'<last_name>','country':'Turkey','city':'Istanbul'}"
values = {'first_name':'muhammet','last_name':'guner'}
print(replace_json_placeholders(json,values))

Thanks a lot! Very useful for me...

will it work also for deep nested json?

@avico78 Yes . This code is a lexical search and replace which looks at given string as a single blob of data. nested placeholders with the same keyword may not work well