client.write() does not work with python 2.7

[Notargets]

When I try the example in the README, it fails with a corrupted time index:

import numpy as np
import pandas as pd
import pymarketstore as pymkts

data = np.array([(pd.Timestamp('2017-01-01 00:00').value / 10**9, 10.0)], dtype=[('Epoch', 'i8'), ('Ask', 'f4')])

cli = pymkts.Client()

cli.write(data, 'TEST/1Min/Tick')

d2 = cli.query(pymkts.Params('TEST', '1Min', 'Tick')).first().df()
print d2

I get the following output:

# python tests/basic_driver.py 
Empty DataFrame
Columns: [Ask]
Index: []

I believe the problem is in the handling of the numpy data in the driver as compared with the handling in the API code in the marketstore server. To fix this, we should:

• develop and document the binary data interchange format
• implement a basic sanity test of the index values used in the data package - perhaps send the beginning and ending values of time index in the intended write data in the data package
• implement a system level test in CircleCI that verifies this driver's correct operation with the latest marketstore codebase

[Notargets]

verified that the behavior is this: works with python3, but not with python 2.7, so relabeling issue...