dates
The two values an EDF start date takes when the real date is not known.
A recording's start is stored as a full timestamp, so a recording without a date still carries one. Two spellings mean "unknown", and readers must recognise both:
- 1900-01-01, which the header parser gives a recording whose header carries no usable start date at all. Its time of day is not usable either.
- 1985-01-01, EDF+'s own marker for an unknown or removed start date, spelled
01.01.85in the header. EDF+ removes the date and keeps the time of day, so the time stays meaningful.
EDF_UNKNOWN_START_DATE = date(1985, 1, 1)
module-attribute
¶
EDF+'s marker for an unknown or removed start date, 01.01.85 in the header.
NO_HEADER_DATE_YEAR = 1900
module-attribute
¶
The year the header parser gives a recording whose header carries no usable date.
parse_edf_start_date(start_date)
¶
Parse the dd.mm.yy start date field of an EDF header.
The two-digit year is read as the most recent year that is not in the
future: 68 is 1968, not 2068. 01.01.85 therefore parses as
1985-01-01, which is also EDF+'s marker for an unknown date; the two are
spelled identically, so the parser cannot tell them apart and does not
try. :data:EDF_UNKNOWN_START_DATE lets a reader recognise it.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
start_date
|
str
|
The field's text, e.g. |
required |
Returns:
| Type | Description |
|---|---|
date | None
|
The date, or None if the field is not a valid date. |
parse_edf_start_time(start_time)
¶
Parse the hh.mm.ss start time field of an EDF header.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
start_time
|
str
|
The field's text, e.g. |
required |
Returns:
| Type | Description |
|---|---|
time | None
|
The time, or None if the field is not a valid time. |