workaround python 2/3 incompatibilities in formatting/parsing of long integers

gistfile1.py

import six
import tokenize
import numpy as np

def _filter_tokens(s):
    last_token_was_number = False
    for token in tokenize.generate_tokens(six.StringIO(s).read):
        token_type = token[0]
        token_string = token[1]
        if (last_token_was_number
            and token_type == tokenize.NAME
            and token_string == "L"):
            continue
        else:
            yield token
        last_token_was_number = (token_type == tokenize.NUMBER)

def fixup_header(s):
    return tokenize.untokenize(_filter_tokens(s))

def test_fixup_header():
    assert (np.safe_eval(fixup_header('{"a": 1L, "b": "1L"}'))
            == {"a": 1, "b": "1L"})