json-to-csv.py: a handy tool for wallet transaction analysis

[mikegogulski]

I'm sure somebody has rolled this up before, but I had cause to today.

Usage:
 bitcoind listtransactions '*' 999999 | python json-to-csv.py > transactions.csv
 Use favorite spreadsheet program to open transactions.csv

Code:

#!/usr/bin/python

import json
import sys

input = sys.stdin.read()
data = json.loads(input)

keys = []

for record in data:
	for key in record:
		if key not in keys:
			keys.append(key)

cur = ""
output = ""

for key in keys:
	output += '"' + key + '",'
output += '\n'

for record in data:
	for key in keys:
		if key in record:
			if record[key].__class__ is int or record[key].__class__ is float:
				output += str(record[key])
			else:
				output += '"' + record[key] + '"'
		output += ','
	output += '\n'

print output

[Gavin Andresen]

I think I meant to post my version and just got busy and forgot...

#!/usr/bin/env python
#
# Reads an array of JSON objects and writes out CSV-format,
# with key names in first row.
# Columns will be union of all keys in the objects.
#

import csv
import json
import sys

json_string = sys.stdin.read()
json_array = json.loads(json_string)

columns = set()
for item in json_array:
  columns.update(set(item))

writer = csv.writer(sys.stdout)
writer.writerow(list(columns))
for item in json_array:
  row = []
  for c in columns:
    if c in item: row.append(str(item[c]))
    else: row.append('')
  writer.writerow(row)

[mikegogulski]

I think I meant to post my version and just got busy and forgot...

Oh. There's a python CSV module. *facepalm*. Way sexier, sir!