epicsarchiver.retrieval.archive_event

Archive Event module for the ArchiveEvent class.

Attributes

ArchiveEventsData

Classes

FieldValue	Basic representation of a changed field value from an archive event.
ArchiveEventsMeta	Metadata about a year's chunk of archived events.
ArchiveEvent	One Event, retrieved from the AA, representing a change in value of a PV.

Module Contents

class epicsarchiver.retrieval.archive_event.FieldValue

Basic representation of a changed field value from an archive event.

Returns:

Pair of name and value

Return type:

FieldValue

name: str

value: str

class epicsarchiver.retrieval.archive_event.ArchiveEventsMeta

Metadata about a year’s chunk of archived events.

pv_name: str

pv_type: str

element_count: int

headers: list[FieldValue]

year: int

epicsarchiver.retrieval.archive_event.ArchiveEventsData

class epicsarchiver.retrieval.archive_event.ArchiveEvent

One Event, retrieved from the AA, representing a change in value of a PV.

pv: str

val: int | float | str | list[str] | list[int] | list[float] | bytes

secondsintoyear: int

year: int

nanos: int

severity: int

status: int

field_values: list[FieldValue] | None

property timestamp_ns: int

Nanoseconds since Unix epoch.

Returns:

nanoseconds since Unix epoch, compatible with pl.Datetime(“ns”, “UTC”)

Return type:

int

property timestamp: datetime.datetime

UTC datetime (microsecond precision), derived from timestamp_ns.

Returns:

UTC datetime

Return type:

datetime.datetime

property field_values_dict: dict[str, str]

Provides a dict of field values.

Returns:

dict of field names and values

Return type:

dict[str, str]