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REF: use inherit_names for DTI #31468

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merged 1 commit into from
Jan 31, 2020
Merged

REF: use inherit_names for DTI #31468

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64 changes: 22 additions & 42 deletions pandas/core/indexes/datetimes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -20,18 +20,14 @@
from pandas.core.dtypes.dtypes import DatetimeTZDtype
from pandas.core.dtypes.missing import is_valid_nat_for_dtype

from pandas.core.accessor import delegate_names
from pandas.core.arrays.datetimes import (
DatetimeArray,
tz_to_dtype,
validate_tz_from_dtype,
)
import pandas.core.common as com
from pandas.core.indexes.base import Index, InvalidIndexError, maybe_extract_name
from pandas.core.indexes.datetimelike import (
DatetimelikeDelegateMixin,
DatetimeTimedeltaMixin,
)
from pandas.core.indexes.datetimelike import DatetimeTimedeltaMixin
from pandas.core.indexes.extension import inherit_names
from pandas.core.ops import get_op_result_name
import pandas.core.tools.datetimes as tools
Expand Down Expand Up @@ -59,32 +55,13 @@ def _new_DatetimeIndex(cls, d):
return result


class DatetimeDelegateMixin(DatetimelikeDelegateMixin):
# Most attrs are dispatched via datetimelike_{ops,methods}
# Some are "raw" methods, the result is not not re-boxed in an Index
# We also have a few "extra" attrs, which may or may not be raw,
# which we we dont' want to expose in the .dt accessor.
_extra_methods = ["to_period", "to_perioddelta", "to_julian_date", "strftime"]
_extra_raw_methods = [
"to_pydatetime",
"_local_timestamps",
"_has_same_tz",
"_format_native_types",
"__iter__",
]
_extra_raw_properties = ["_box_func", "tz", "tzinfo", "dtype"]
_delegated_properties = DatetimeArray._datetimelike_ops + _extra_raw_properties
_delegated_methods = (
DatetimeArray._datetimelike_methods + _extra_methods + _extra_raw_methods
)
_raw_properties = (
{"date", "time", "timetz"}
| set(DatetimeArray._bool_ops)
| set(_extra_raw_properties)
)
_raw_methods = set(_extra_raw_methods)


@inherit_names(
["to_period", "to_perioddelta", "to_julian_date", "strftime"]
+ DatetimeArray._field_ops
+ DatetimeArray._datetimelike_methods,
DatetimeArray,
wrap=True,
)
@inherit_names(["_timezone", "is_normalized", "_resolution"], DatetimeArray, cache=True)
@inherit_names(
[
Expand All @@ -93,19 +70,22 @@ class DatetimeDelegateMixin(DatetimelikeDelegateMixin):
"_field_ops",
"_datetimelike_ops",
"_datetimelike_methods",
],
DatetimeArray,
)
@delegate_names(
DatetimeArray, DatetimeDelegateMixin._delegated_properties, typ="property"
)
@delegate_names(
"_box_func",
"tz",
"tzinfo",
"dtype",
"to_pydatetime",
"_local_timestamps",
"_has_same_tz",
"_format_native_types",
"date",
"time",
"timetz",
]
+ DatetimeArray._bool_ops,
DatetimeArray,
DatetimeDelegateMixin._delegated_methods,
typ="method",
overwrite=True,
)
class DatetimeIndex(DatetimeTimedeltaMixin, DatetimeDelegateMixin):
class DatetimeIndex(DatetimeTimedeltaMixin):
"""
Immutable ndarray of datetime64 data, represented internally as int64, and
which can be boxed to Timestamp objects that are subclasses of datetime and
Expand Down