aniso8601 0.49

A library for parsing ISO 8601 strings.

Features

• Pure Python implementation

• No extra dependencies

• Logical behavior

• Parse a time, get a datetime.time

• Parse a date, get a datetime.date

• Parse a date time, get a datetime.datetime

• UTC offset represented as fixed-offset tzinfo

• No regular expressions

Use

Parsing datetimes

To parse a typical ISO 8601 datetime string:

>>> import aniso8601
>>> aniso8601.parse_datetime('1977-06-10T12:00:00Z')
datetime.datetime(1977, 6, 10, 12, 0, tzinfo=<aniso8601.UTCOffset object at 0x7f44fadbbd90>)

Alternative delimiters can be specified, for example, a space:

>>> aniso8601.parse_datetime('1977-06-10 12:00:00Z', delimiter=' ')
datetime.datetime(1977, 6, 10, 12, 0, tzinfo=<aniso8601.UTCOffset object at 0x7f44fadbbf50>)

UTC offsets are supported:

>>> aniso8601.parse_datetime('1979-06-05T08:00:00-08:00')
datetime.datetime(1979, 6, 5, 8, 0, tzinfo=<aniso8601.UTCOffset object at 0x7f44fadbbf50>)

If a UTC offset is not specified, the returned datetime will be naive:

>>> aniso8601.parse_datetime('1983-01-22T08:00:00')
datetime.datetime(1983, 1, 22, 8, 0)

Parsing dates

To parse a date represented in an ISO 8601 string:

>>> import aniso8601
>>> aniso8601.parse_date('1984-04-23')
datetime.date(1984, 4, 23)

Basic format is supported as well:

>>> aniso8601.parse_date('19840423')
datetime.date(1984, 4, 23)

To parse a date using the ISO 8601 week date format:

>>> aniso8601.parse_date('1986-W38-1')
datetime.date(1986, 9, 15)

To parse an ISO 8601 ordinal date:

>>> aniso8601.parse_date('1988-132')
datetime.date(1988, 5, 11)

Parsing times

To parse a time formatted as an ISO 8601 string:

>>> import aniso8601
>>> aniso8601.parse_time('11:31:14')
datetime.time(11, 31, 14)

As with all of the above, basic format is supported:

>>> aniso8601.parse_time('113114')
datetime.time(11, 31, 14)

A UTC offset can be specified for times:

>>> aniso8601.parse_time('17:18:19-02:30')
datetime.time(17, 18, 19, tzinfo=<aniso8601.UTCOffset object at 0x7f44fad82c50>)
>>> aniso8601.parse_time('171819Z')
datetime.time(17, 18, 19, tzinfo=<aniso8601.UTCOffset object at 0x7f44fadbbd90>)

Reduced accuracy is supported:

>>> aniso8601.parse_time('21:42')
datetime.time(21, 42)
>>> aniso8601.parse_time('22')
datetime.time(22, 0)

A decimal fraction is always allowed on the lowest order element of an ISO 8601 formatted time:

>>> aniso8601.parse_time('22:33.5')
datetime.time(22, 33, 30)
>>> aniso8601.parse_time('23.75')
datetime.time(23, 45)

Tests

To run the unit tests:

$ python -m unittest aniso8601.test_aniso8601

References

• ISO 8601:2004(E) (Caution, PDF link)

• Wikipedia article on ISO 8601

• Discussion on alternative ISO 8601 parsers for Python