Read a CSV, spit out JSON for D3

gistfile1.py

import csv
import json

is_first_line = True

input_file_name = "your_file_here.csv"

output_file_name = "arrays.json"

output_json_obj = open(output_file_name, "wb")

with open(input_file_name, "rb") as file:
    csv_data = csv.reader(file)
    output_json_obj.write("[")
    for row in csv_data:
       if is_first_line == False:
           output_json_obj.write(",")
       else:
            is_first_line = False
       json.dump(row, output_json_obj)
    output_json_obj.write("]")
    output_json_obj.close()