Cannot create Table with Array of Timestamp type

[kylebarron]

Discussed in #458

^{Originally posted by yunzheng November 20, 2025}
I'm trying to avoid pyarrow (due to it's size) and use arro3, but creating a Table with datetime objects doesn't seem to work yet:

from datetime import datetime, timezone

from arro3.core import Array, DataType, Table

a = Array([datetime.now(tz=timezone.utc)], type=DataType.timestamp("ns", tz="UTC"))
table = Table.from_pydict({"dt": a})

will raise the error:

NotImplementedError: Array constructor for Timestamp(Nanosecond, Some("UTC")) not yet implemented.

So it seems it's not implemented yet. But reading data with timestamps from disk (created using pyarrow) works just fine. So I was wondering if there are any workarounds?

[surister]

take

[surister]

Table display currently does not support printing timezone, will have to be fixed as well:

a2t = Array([datetime.now(tz=timezone(timedelta(hours=2)))], type=DataType.timestamp("s", tz="UTC+2"))
table = Table.from_pydict({"dt0": a0, "dt1": a1, "dt2": a0t, "dt3": a2t})
#E       pyo3_runtime.PanicException: a Display implementation returned an error unexpectedly: Error
#tests/core/test_types.py:18: PanicException

Additionally, printing the array ignores the tz info:

a2t = Array([datetime.now(tz=timezone(timedelta(hours=2)))], type=DataType.timestamp("s", tz="UTC+2"))
print(a2t)
# arro3.core.Array<Timestamp(s)>
# [
#  2025-12-05T12:26:02,
# ]

[surister]

It's the array that cannot display other tz than Utc

a0t = Array([dt.astimezone(tz=timezone.utc)], type=DataType.timestamp("s", tz="UTC"))
a1t = Array([datetime.now(tz=timezone(timedelta(hours=-2)))], type=DataType.timestamp("s", tz="UTC+2"))

arro3.core.Array<Timestamp(s, "UTC")>
[
  1999-08-07T09:12:13Z,
]
thread '<unnamed>' (176342) panicked at /home/surister/.rustup/toolchains/stable-x86_64-unknown-linux-gnu/lib/rustlib/src/rust/library/alloc/src/string.rs:2821:14:
a Display implementation returned an error unexpectedly: Error

because:

thread '<unnamed>' (190818) panicked at pyo3-arrow/src/array.rs:160:68:
called `Result::unwrap()` on an `Err` value: ParseError("Invalid timezone \"UTC+2\": failed to parse timezone")

Update:
It's actually good 🤦 , this is not a correct IANA identifier for a timezone, that's just a UTC offset that corresponds to some IANA identifier.