AttributeError: 'Timestamp' object has no attribute 'astype'

[anegrean]

Arctic Version

1.82.2

Arctic Store

TickStore

Platform and version

OS

NAME="Linux Mint"
VERSION="21.3 (Virginia)"
ID=linuxmint
ID_LIKE="ubuntu debian"

MongoDB

db version v6.0.13
Build Info: {
"version": "6.0.13",
"gitVersion": "3b13907f9bdf6bd3264d67140d6c215d51bbd20c",
"openSSLVersion": "OpenSSL 3.0.2 15 Mar 2022",
"modules": [],
"allocator": "tcmalloc",
"environment": {
"distmod": "ubuntu2204",
"distarch": "x86_64",
"target_arch": "x86_64"
}
}

Python

Python 3.10

Description of problem and/or code sample that reproduces the issue

AttributeError: 'Timestamp' object has no attribute 'astype'

Code

import pandas as pd
from datetime import datetime as dt

from arctic import Arctic, TICK_STORE
from arctic.date._mktz import mktz

db = Arctic('localhost')
db.delete_library('temp')
db.initialize_library('temp', lib_type=TICK_STORE)
tickstore_lib = db['temp']

data = [{'A': 120, 'D': 1}, {'A': 122, 'B': 2.0}, {'A': 3, 'B': 3.0, 'D': 1}]
tick_index = [dt(2013, 6, 1, 12, 00, tzinfo=mktz('UTC')),
dt(2013, 6, 1, 11, 00, tzinfo=mktz('UTC')), # Out-of-order
dt(2013, 6, 1, 13, 00, tzinfo=mktz('UTC'))]

data = pd.DataFrame(data, index=tick_index)

tickstore_lib._chunk_size = 3
tickstore_lib.write('SYM', data)
print(tickstore_lib.read('SYM', columns=None).index)

Traceback

---

AttributeError Traceback (most recent call last)
Cell In[73], line 21
18 data = pd.DataFrame(data, index=tick_index)
20 tickstore_lib._chunk_size = 3
---> 21 tickstore_lib.write('SYM', data)
22 print(tickstore_lib.read('SYM', columns=None).index)

File ~/miniforge3/envs/trading2/lib/python3.10/site-packages/arctic/tickstore/tickstore.py:600, in TickStore.write(self, symbol, data, initial_image, metadata)
597 self._assert_nonoverlapping_data(symbol, to_dt(start), to_dt(end))
599 if pandas:
--> 600 buckets = self._pandas_to_buckets(data, symbol, initial_image)
601 else:
602 buckets = self._to_buckets(data, symbol, initial_image)

File ~/miniforge3/envs/trading2/lib/python3.10/site-packages/arctic/tickstore/tickstore.py:621, in TickStore._pandas_to_buckets(self, x, symbol, initial_image)
619 rtn = []
620 for i in range(0, len(x), self._chunk_size):
--> 621 bucket, initial_image = TickStore._pandas_to_bucket(x[i:i + self._chunk_size], symbol, initial_image)
622 rtn.append(bucket)
623 return rtn

File ~/miniforge3/envs/trading2/lib/python3.10/site-packages/arctic/tickstore/tickstore.py:729, in TickStore._pandas_to_bucket(df, symbol, initial_image)
721 col_data = {
722 DATA: Binary(lz4_compressHC(array.tobytes())),
723 ROWMASK: rowmask,
724 DTYPE: TickStore._str_dtype(array.dtype),
725 }
726 rtn[COLUMNS][col] = col_data
727 rtn[INDEX] = Binary(
728 lz4_compressHC(np.concatenate(
--> 729 ([recs[index_name][0].astype('datetime64[ms]').view('uint64')],
730 np.diff(
731 recs[index_name].astype('datetime64[ms]').view('uint64')))).tobytes()))
732 return rtn, final_image

AttributeError: 'Timestamp' object has no attribute 'astype'