Canonical, human-readable string representations for datetimes, durations, intervals, microplates, and more.

Prescribes a unique, unambiguous, human-readable, easily typed, and easily parsed representation for any single entity. It builds on existing standards, restricting as needed to get unique representations.

• UTC instant: 2022-09-01T00:22:56Z (RFC 3339 subset)
• instant with offset: 2022-09-01T00:22:56-02:00 (RFC 3339 subset)
• instant with IANA zone: 2022-09-01T00:22:56-02:00 [America/Los_Angeles] (commonplace)
• duration: P365DT59M59.5S (ISO 8601 subset)
• interval: 2022-09-01T00:22:56+00:00--2022-09-01T00:22:56+00:00 (ISO 8601 subset)
• repeating interval: R5/2022-09-01T00:22:56Z+00:00--2022-09-01T00:22:56+00:00 (ISO 8601 subset)
• repeating event: R5/P365D (like ISO 8601)
• repeating period: R5/P30D--P60D (like ISO 8601)
• microplate well: A01 (commonplace)
• microplate well set: A01-A12, A01-H01, A01*D3, A01...B6, A01,B02,C03 (custom)
• image coordinates: (0,0)x(5,5) (where 0,0 is top left)
• dimensioned value: 9.80665 m/s^2 (Pint subset)

from realized import SECOND, InstantUtc, Well8x12, WellSet8x12

dt = InstantUtc[SECOND].from_str("2022-09-01T00:22:56Z")
Well8x12.from_index(1).as_str  # A01
WellSet8x12.from_str("A01-A03").wells  # A01, A02, A03

Uses a restricted subset of ISO 8601 periods. Forbids years, months, and weeks. Always requires T for time (e.g. PT1H rather than P1H).

from realized import Duration

duration = Duration.from_seconds(55)
print(duration.to_str)  # PT1S

Input:

^\d{2,}:(?:[12]\d|\d):(?:[12]\d|\d)(?:\.\d{1,9})?$

Quantity with unit (SI plus a few).

Input: RFC 3339 with a Z.

Input: RFC 3339 with a UTC offset. Uses - for minus, and forbids negative UTC (-00:00).

Offset plus IANA timezone in square brackets. Uses - for minus, and forbids negative UTC (-00:00).

Represent a start and end time. In general, end − start != duration ! NTP sync events, Daylight Saving Time start/end, or the user got on a plane.

One of the above, separated by a --. For example: 2022-02-26T22:55:46.22562-08:00--2022-02-26T22:55:46.22562-08:00

ISO 8601 repeating interval.

Repeats 4 times, for 5 total intervals: R4/2022-02-26T22:55:46-08:00--2023-02-26T22:55:46-08:00

Happens every 30 sec: R4/PT30S

Happens every 30 sec and lasts for 2 sec, starting at 28 sec: R4/PT28S--PT30S

Normalized:

^[A-Z]{1,2}\d{1,3}$

Normalization procedure:

• Balk if the number of digits doesn't match (e.g. H1 instead of H01)

• 6-well: rows A to B and columns 1 to 3; e.g. B3

• 12-well: rows A to C and columns 1 to 4; e.g. C4

• 24-well: rows A to D and columns 1 to 6; e.g. D6

• 48-well: rows A to F and columns 1 to 8; e.g. F8

• 96-well: rows A to H and columns 01 to 12; e.g. H12

• 384-well: rows A to P and columns 01 to 24; e.g. B24

• 1536-well: rows AA to BF and columns 01 to 48; e.g. BF48

• 3456-well: rows AA to BV and columns 01 to 72; e.g. BV72

Normalization procedure:

TODO

Operators:

• Range in a single row: A02-A12
• Range in a single column: A01-G01
• Rectangular block: A02*G11
• Read like a book: A01...C04
• Pick and choose: A01,C04
• Comma-separated: A01,C01

New issues and pull requests are welcome. Please refer to the contributing guide and security policy. Generated with tyrannosaurus: tyrannosaurus new