piston outputs invalid json

[sneak]

The docs suggest the following:

sneak@pris:~$ pip3 install steem-piston
Collecting steem-piston
....usw....

Installed fine. Testing, per the docs:

piston -x transfer --account xeroc fabian 0.001 SBD > unsigned-transaction.json

This outputs the following to unsigned-transaction.json:

{'blockchain': {'chain_id': '0000000000000000000000000000000000000000000000000000000000000000',
                'core_symbol': 'STEEM',
                'prefix': 'STM'},
 'expiration': '2017-02-06T06:37:38',
 'extensions': [],
 'missing_signatures': ['STM6quoHiVnmiDEXyz4fAsrNd28G6q7qBCitWbZGo4pTfQn8SwkzD'],
 'operations': [['transfer',
                 {'amount': '0.001 SBD',
                  'from': 'xeroc',
                  'memo': '',
                  'to': 'fabian'}]],
 'ref_block_num': 14098,
 'ref_block_prefix': 3767381196,
 'required_authorities': {'xeroc': {'account_auths': [],
                                    'key_auths': [['STM6quoHiVnmiDEXyz4fAsrNd28G6q7qBCitWbZGo4pTfQn8SwkzD',
                                                   1]],
                                    'weight_threshold': 1}},
 'signatures': []}

Then, trying to parse:

sneak@pris:~$ jq . unsigned-transaction.json 
parse error: Invalid numeric literal at line 1, column 14

Turns out, json requires double quotes. Single-quoted keys and strings are invalid json.

[xeroc]

Yhea .. it's not real json .. it is the output of pprint which just looks like json ...
I should probably change pprint and make it a print(json.dumps(x, indent=4))

In the meantime, you can still load the file into python using

   with open(args.file) as fp:
        tx = fp.read()
        json_tx = eval(tx)