>>> from iso8601utils import parsers, interval, duration

# Intervals
>>> i = parsers.interval('R8/2016-08-01T23:10:59.111Z/2016-08-08T00:13:23.001Z')
>>> i
iso8601utils.interval(R8/2016-08-01T23:10:59.111000Z/2016-08-08T00:13:23.001000Z)

# Decompose interval into an (int, datetime, datetime, iso8601utils.duration)
# tuple representing (repeats, start, end, duration)
>>> tuple(i)
(8, datetime.datetime(2016, 8, 1, 23, 10, 59, 111000, tzinfo=Z), datetime.datetime(2016, 8, 8, 0, 13, 23, 1000, tzinfo=Z), iso8601utils.duration(P6DT1H2M23.89S))

# Public properties
>>> i.repeats
8
>>> i.start
datetime.datetime(2016, 8, 1, 23, 10, 59, 111000, tzinfo=Z)
>>> i.end
datetime.datetime(2016, 8, 8, 0, 13, 23, 1000, tzinfo=Z)
>>> i.duration
iso8601utils.duration(P6DT1H2M23.89S)

# Durations
>>> d = parsers.duration('P3Y6M4DT12H30M5S')
>>> d
iso8601utils.duration(P3Y6M4DT12H30M5S)

# Decompose duration into a (timedelta, monthdelta) tuple
>>> tuple(d)
(datetime.timedelta(4, 45005), MonthDelta(42))

# Public properties
>>> d.timedelta
datetime.timedelta(4, 45005)
>>> d.monthdelta
MonthDelta(42)

# Add and subtract durations with datetime objects
>>> from datetime import datetime
>>> dt = datetime(2016, 11, 4, 4, 49, 4)
>>> dt + d
datetime.datetime(2020, 5, 8, 17, 19, 9)
>>> dt - d
datetime.datetime(2013, 4, 30, 16, 18, 59)

# Add and subtract durations
>>> a = duration(years=1, months=5, days=3, hours=12)
>>> b = duration(days=2, hours=5)
>>> a + b
iso8601utils.duration(P1Y5M3DT17H)
>>> a - b
iso8601utils.duration(P1Y5M1DT7H)

# Compare durations
>>> a < b
False
>>> a > b
True

>>> from iso8601utils import parsers

# Parse intervals
>>> parsers.interval('2016-08-01T23:10:59.111Z/2016-08-08T00:13:23.001Z')
iso8601utils.interval(2016-08-01T23:10:59.111000Z/2016-08-08T00:13:23.001000Z)

>>> parsers.interval('R5/2002-08-15T16:20:05.100+08:10/2002-10-12T17:05:25.020-01:40')
iso8601utils.interval(R5/2002-08-15T16:20:05.100000+08:10/2002-10-12T17:05:25.020000-01:40)

# Parse durations
>>> parsers.duration('P3Y6M4DT12H30M5S')
iso8601utils.duration(P3Y6M4DT12H30M5S)

# Parse times
>>> parsers.time('13:15+05:10')
datetime.time(13, 15, tzinfo=+05:10)

# Parse dates
>>> parsers.date('1981-04-05')
datetime.date(1981, 4, 5)

# Parse datetimes
>>> parsers.datetime('2007-08-09T12:30-02:00')
datetime.datetime(2007, 8, 9, 12, 30, tzinfo=-02:00)

# Parse ordinal dates
>>> parsers.date('1981-095')
datetime.date(1981, 4, 5)

# Parse week dates
>>> parsers.date('2016-W43-1')
datetime.date(2016, 10, 24)

# Validate strings
>>> from iso8601utils import validators
>>> validators.interval('1999-12-31T16:00:00.000+04:00/P5DT7H')
True
>>> validators.interval('23P7DT5H')
False
>>> validators.duration('P3Y6M4W7DT12H30M5S')
True
>>> validators.duration('23P7DT5H')
False
>>> validators.time('13:15+05:10')
True
>>> validators.date('1981-04-05')
True
>>> validators.date('1981-095')
True
>>> validators.date('1981-W43-1')
True
>>> validators.date('1981W43-1')
False