JSONS to CSV

# i'm ashamed
# it's shit, everything is shit

import json
from collections import OrderedDict

def commaSeparateJSONData(json_list):
    csv_str = ''
    json_list_length = len(json_list)
    json_list_last_idx = json_list_length - 1

    for index in range(json_list_length):
        csv_str += '"{0}"'.format(str(json_list[index]).replace('\"', '\"\"'))

        if index < json_list_last_idx:
            csv_str += ','

    return csv_str + '\r\n'


print("\nJSONS to CSV Converter")
print("----------------------\n")

while True:
    jsons_filename = input("Enter JSONS file (leave blank to exit): ").strip()
    if jsons_filename == '' :
        break

    try:
        jsons_fh = open(jsons_filename, 'rt')
    except IOError as err_inst:
        print("Error opening file {0}: {1}".format(jsons_filename, err_inst))
        continue
    else:
        csv_filename = jsons_fh.name + '.csv'
        print("Creating conversion file: {0}".format(csv_filename))

        try:
            csv_fh = open(csv_filename, 'wt', encoding='utf-8')
            csv_fh.truncate()
        except IOError as err_inst:
            print("Error writing file {0}: {1}".format(filename, err_inst))
        else:
            from json.decoder import JSONDecodeError
            try:
                lines_processed = 0
                line = jsons_fh.readline().strip()
                while line != '':
                    json_obj = json.loads(line, object_pairs_hook=OrderedDict)
                    if (csv_fh.tell() == 0):
                        csv_fh.write(commaSeparateJSONData(list(json_obj.keys())))

                    csv_fh.write(commaSeparateJSONData(list(json_obj.values())))
                    lines_processed += 1
                    line = jsons_fh.readline().strip()
            except JSONDecodeError as err_inst:
                print("JSON Error: {0}".format(err_inst))
            finally:
                csv_fh.close()

        finally:
            jsons_fh.close()

            print("Lines processed: ", lines_processed)
            print("Execution finished.")
            break