| 371 | return Variable(dims, data, attrs, encoding, fastpath=True) |
| 372 | |
| 373 | def decode(self, variable: Variable, name: T_Name = None): |
| 374 | raw_fill_dict, encoded_fill_values = _check_fill_values( |
| 375 | variable.attrs, name, variable.dtype |
| 376 | ) |
| 377 | if "_Unsigned" not in variable.attrs and not raw_fill_dict: |
| 378 | return variable |
| 379 | |
| 380 | dims, data, attrs, encoding = unpack_for_decoding(variable) |
| 381 | |
| 382 | # Even if _Unsigned is used, retain on-disk _FillValue |
| 383 | for attr, value in raw_fill_dict.items(): |
| 384 | safe_setitem(encoding, attr, value, name=name) |
| 385 | |
| 386 | if "_Unsigned" in attrs: |
| 387 | unsigned = pop_to(attrs, encoding, "_Unsigned") |
| 388 | data = _convert_unsigned_fill_value( |
| 389 | name, |
| 390 | data, |
| 391 | unsigned, |
| 392 | raw_fill_dict.get("_FillValue"), |
| 393 | encoded_fill_values, |
| 394 | ) |
| 395 | |
| 396 | if encoded_fill_values: |
| 397 | dtype: np.typing.DTypeLike |
| 398 | decoded_fill_value: Any |
| 399 | # in case of packed data we have to decode into float |
| 400 | # in any case |
| 401 | if "scale_factor" in attrs or "add_offset" in attrs: |
| 402 | dtype, decoded_fill_value = ( |
| 403 | _choose_float_dtype(data.dtype, attrs), |
| 404 | np.nan, |
| 405 | ) |
| 406 | else: |
| 407 | # in case of no-packing special case DateTime/Timedelta to properly |
| 408 | # handle NaT, we need to check if time-like will be decoded |
| 409 | # or not in further processing |
| 410 | is_time_like = _is_time_like(attrs.get("units")) |
| 411 | if ( |
| 412 | (is_time_like == "datetime" and self.decode_times) |
| 413 | or (is_time_like == "timedelta" and self.decode_timedelta) |
| 414 | ) and data.dtype.kind in "iu": |
| 415 | dtype = np.int64 |
| 416 | decoded_fill_value = np.iinfo(np.int64).min |
| 417 | else: |
| 418 | dtype, decoded_fill_value = dtypes.maybe_promote(data.dtype) |
| 419 | |
| 420 | transform = partial( |
| 421 | _apply_mask, |
| 422 | encoded_fill_values=encoded_fill_values, |
| 423 | decoded_fill_value=decoded_fill_value, |
| 424 | dtype=dtype, |
| 425 | ) |
| 426 | data = lazy_elemwise_func(data, transform, dtype) |
| 427 | |
| 428 | return Variable(dims, data, attrs, encoding, fastpath=True) |
| 429 | |
| 430 | |