icalendar.prop.dt.duration module#
DURATION property type from RFC 5545.
- class icalendar.prop.dt.duration.vDuration(td, /, params=None)[source]#
Bases:
TimeBaseDuration
- Value Name:
DURATION
- Purpose:
This value type is used to identify properties that contain a duration of time.
- Format Definition:
This value type is defined by the following notation:
dur-value = (["+"] / "-") "P" (dur-date / dur-time / dur-week) dur-date = dur-day [dur-time] dur-time = "T" (dur-hour / dur-minute / dur-second) dur-week = 1*DIGIT "W" dur-hour = 1*DIGIT "H" [dur-minute] dur-minute = 1*DIGIT "M" [dur-second] dur-second = 1*DIGIT "S" dur-day = 1*DIGIT "D"
- Description:
If the property permits, multiple "duration" values are specified by a COMMA-separated list of values. The format is based on the [ISO.8601.2004] complete representation basic format with designators for the duration of time. The format can represent nominal durations (weeks and days) and accurate durations (hours, minutes, and seconds). Note that unlike [ISO.8601.2004], this value type doesn't support the "Y" and "M" designators to specify durations in terms of years and months. The duration of a week or a day depends on its position in the calendar. In the case of discontinuities in the time scale, such as the change from standard time to daylight time and back, the computation of the exact duration requires the subtraction or addition of the change of duration of the discontinuity. Leap seconds MUST NOT be considered when computing an exact duration. When computing an exact duration, the greatest order time components MUST be added first, that is, the number of days MUST be added first, followed by the number of hours, number of minutes, and number of seconds.
Example
A duration of 15 days, 5 hours, and 20 seconds would be:
P15DT5H0M20S
A duration of 7 weeks would be:
P7W
>>> from icalendar.prop import vDuration >>> duration = vDuration.from_ical('P15DT5H0M20S') >>> duration datetime.timedelta(days=15, seconds=18020) >>> duration = vDuration.from_ical('P7W') >>> duration datetime.timedelta(days=49)
- property RANGE: RANGE | str | None#
Specify the effective range of recurrence instances from the instance specified by the recurrence identifier specified by the property.
- Description:
This parameter can be specified on a property that specifies a recurrence identifier. The parameter specifies the effective range of recurrence instances that is specified by the property. The effective range is from the recurrence identifier specified by the property. If this parameter is not specified on an allowed property, then the default range is the single instance specified by the recurrence identifier value of the property. The parameter value can only be "THISANDFUTURE" to indicate a range defined by the recurrence identifier and all subsequent instances. The value "THISANDPRIOR" is deprecated by this revision of iCalendar and MUST NOT be generated by applications.
- property RELATED: RELATED | str#
Specify the relationship of the alarm trigger with respect to the start or end of the calendar component.
- Description:
This parameter can be specified on properties that specify an alarm trigger with a "DURATION" value type. The parameter specifies whether the alarm will trigger relative to the start or end of the calendar component. The parameter value START will set the alarm to trigger off the start of the calendar component; the parameter value END will set the alarm to trigger off the end of the calendar component. If the parameter is not specified on an allowable property, then the default is START.
- property TZID: str | None#
Specify the identifier for the time zone definition for a time component in the property value.
- Description:
This parameter MUST be specified on the "DTSTART", "DTEND", "DUE", "EXDATE", and "RDATE" properties when either a DATE-TIME or TIME value type is specified and when the value is neither a UTC or a "floating" time. Refer to the DATE-TIME or TIME value type definition for a description of UTC and "floating time" formats. This property parameter specifies a text value that uniquely identifies the "VTIMEZONE" calendar component to be used when evaluating the time portion of the property. The value of the "TZID" property parameter will be equal to the value of the "TZID" property for the matching time zone definition. An individual "VTIMEZONE" calendar component MUST be specified for each unique "TZID" parameter value specified in the iCalendar object.
The parameter MUST be specified on properties with a DATE-TIME value if the DATE-TIME is not either a UTC or a "floating" time. Failure to include and follow VTIMEZONE definitions in iCalendar objects may lead to inconsistent understanding of the local time at any given location.
The presence of the SOLIDUS character as a prefix, indicates that this "TZID" represents a unique ID in a globally defined time zone registry (when such registry is defined).
Note
This document does not define a naming convention for time zone identifiers. Implementers may want to use the naming conventions defined in existing time zone specifications such as the public-domain TZ database (TZDB). The specification of globally unique time zone identifiers is not addressed by this document and is left for future study.
- property VALUE: str#
The VALUE parameter or the default.
- Purpose:
VALUE explicitly specify the value type format for a property value.
- Description:
This parameter specifies the value type and format of the property value. The property values MUST be of a single value type. For example, a "RDATE" property cannot have a combination of DATE-TIME and TIME value types.
If the property's value is the default value type, then this parameter need not be specified. However, if the property's default value type is overridden by some other allowable value type, then this parameter MUST be specified.
Applications MUST preserve the value data for
x-nameandiana-tokenvalues that they don't recognize without attempting to interpret or parse the value data.
- Returns:
The VALUE parameter or the default.
Examples
The VALUE defaults to the name of the property. Note that it is case-insensitive but always uppercase.
>>> from icalendar import vBoolean >>> b = vBoolean(True) >>> b.VALUE 'BOOLEAN'
Setting the VALUE parameter of a typed property usually does not make sense. For convenience, using this property, the value will be converted to an uppercase string. If you have some custom property, you might use it like this:
>>> from icalendar import vUnknown, Event >>> v = vUnknown("Some property text.") >>> v.VALUE = "x-type" # lower case >>> v.VALUE 'X-TYPE' >>> event = Event() >>> event.add("x-prop", v) >>> print(event.to_ical()) BEGIN:VEVENT X-PROP;VALUE=X-TYPE:Some property text. END:VEVENT
- classmethod from_jcal(jcal_property)[source]#
Parse jCal from RFC 7265.
- Parameters:
jcal_property (
list) – The jCal property to parse.- Raises:
JCalParsingError – If the provided jCal is invalid.
- Return type:
- ignore_for_equality = {'TZID', 'VALUE'}#
- params: Parameters#
- classmethod parse_jcal_value(jcal)[source]#
Parse a jCal string to a
datetime.timedelta.- Raises:
JCalParsingError – If it can't parse a duration.
- Return type: