dicetables 4.0.2

get all combinations for any set of dice

dicetables v4.0.1

Calculate the Combinations For Any Set of Dice

Have you ever wondered what the chances were for killing that 25 hp creature with your lvl-5 fireball? Of course you have(it’s 3.24%. Good luck with that). What about if you could use your loaded dice that roll 6 twice as often. We’ve got you covered (still only a 10% chance). Want to make sure you’ll win a bet on a number spread for DND dice randomly grabbed from a bag? No problem(“i’ll bet you can’t roll 150-200 on 7D4, 4D8, 5D12 and 4D20” … because it’s a 0.3% chance). Ever wondered what would happen if you flipped a coin a thousand times? (Your chance of flipping heads more than 600 times is 0.000000009%.)

Impress your friends. Wow the gender of your choice - with …. DICETABLES!!!

Getting Started

This module has no dependencies and no requirements. So to get started, simply:

$ pip install dicetables

or:

$ git clone https://github.com/eric-s-s/dice-tables.git
$ cd dice-tables
$ python setup.py install

The basic objects to use are DiceTable or DetailedDiceTable, and any of the dice classes. They are:

• Die

• ModDie

• WeightedDie

• ModWeightedDie

• Modifier

• StrongDie

• Exploding

• ExplodingOn

• BestOfDicePool

• WorstOfDicePool

• UpperMidOfDicePool

• LowerMidOfDicePool

for details about the dice, see The Dice. for details about the dice-tables see DiceTable and DetailedDiceTable

These are all immutable objects. When you add dice to a DiceTable, it returns a new object and doesn’t alter the original. Use the DiceTable.new() class method to create an empty DiceTable.

>>> import dicetables as dt
>>> empty = dt.DiceTable.new()
>>> empty
<DiceTable containing []>
>>> empty.add_die(dt.Die(6), times=10)
<DiceTable containing [10D6]>
>>> empty
<DiceTable containing []>
>>> table = empty.add_die(dt.Die(4), times=3)
>>> table = table.add_die(dt.Die(10), times=5)
>>> table.get_list()
[(Die(4), 3), (Die(10), 5)]
>>> print(table.get_dict())  # This is each roll and how many times it occurs.
{8: 1,
 9: 8,
 10: 36,
 11: 120,
 12: 327,
 ...
 ...
 55: 3072,
 56: 1608,
 57: 768,
 58: 327,
 59: 120,
 60: 36,
 61: 8,
 62: 1}

To get more detailed information, use EventsCalculations. It can get the mean, stddev, a nice string of the combinations, points and axes for graphing, and stats for any set of rolls.

>>> calculator = dt.EventsCalculations(table)
>>> calculator.mean()
35.0
>>> calculator.stddev(decimal_place=8)
6.70820393
>>> calculator.stats_strings(list(range(8, 20)) + [35] + list(range(50, 63)))
StatsStrings(query_values='8-19, 35, 50-62',
             query_occurrences='515,778',
             total_occurrences='6,400,000',
             one_in_chance='12.41',
             pct_chance='8.059')
>>> calculator.percentage_points()
[(8, 1.5624999999999997e-05),
 (9, 0.00012499999999999998),
 (10, 0.0005625),
 ...
 (59, 0.001875),
 (60, 0.0005625),
 (61, 0.00012499999999999998),
 (62, 1.5624999999999997e-05)]
>>> big_table = dt.DetailedDiceTable.new().add_die(dt.Die(6), 1000)
>>> print(big_table.calc.full_table_string())  # DetailedDiceTable owns an EventsCalculations
1000: 1
1001: 1,000
1002: 500,500
1003: 1.672e+8
1004: 4.192e+10
1005: 8.417e+12
...
3513: 1.016e+776
3514: 1.012e+776
3515: 1.007e+776
3516: 1.001e+776
3517: 9.957e+775
3518: 9.898e+775
...
5998: 500,500
5999: 1,000
6000: 1

You can now roll events with a Roller

>>> events = dt.DiceTable.new().add_die(dt.Die(6))
>>> roller = dt.Roller(events)
>>> roller.roll() in [1, 2, 3, 4, 5, 6]
True

That should get you started. For details see http://dice-tables.readthedocs.io/en/latest/

and the github repository at https://github.com/eric-s-s/dice-tables

ChangeLog

v4.0.2

fixed bug in Parser. Before Parser().parse_die(“Die(1, 2, 3)”) returned Die(1). Now, it raises a ParserError. Parser().parse_die(“ModDie(1, 2, modifier=3”) also raises ParserError as does not enough arguments.

v4.0.0

Breaking change again!

Revamped DicePools and the Parser.

Dice Pools

BestOfDicePool, WorstOfDicePool, UpperMidOfDicePool and LowerMidOfDicePool are now ProtoDie wrappers around a DicePool object. DicePool(Die(6), 4) is now a non-IntegerEvents object. It is immutable and can get passed around to various DicePoolCollection objects which are ProtoDie. So now it is:

>>> import dicetables as dt
>>> pool = dt.DicePool(dt.Die(6), 4)
>>> best_of = dt.BestOfDicePool(pool=pool, select=3)
>>> worst_of = dt.BestOfDicePool(pool=pool, select=3)
>>> super_best_of = dt.BestOfDicePool(pool=pool, select=1)

Parser

The parser now takes a LimitChecker object. This defaults to a NoOpLimitChecker which doesn’t check limits and there’s a class method to make a parser with a useful limit checker that is the same as the old behavior. You can pass in your own limit checker provided that it inherits from dicetables.tools.limit_checker.AbstractLimitChecker.

>>> from dicetables import Parser, Die, LimitsError
>>> no_limit = Parser()
>>> Die(1000) == no_limit.parse_die("Die(1000)")
True
>>> limited = Parser.with_limits()
>>> limited.parse_die("Die(1000)")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
LimitsError: Max die_size: 500

v3.0.0

Breaking change! Python 2 is no longer supported

Type hints have been added!

v2.6.0

• added Roller

v2.5.0

• added DicePool die objects:

  • BestOfDicePool

  • WorstOfDicePool

  • UpperMidOfDicePool

  • LowerMidOfDicePool

• Parser().add_die_size_limit_kwarg and Parser().add_explosions_limit_kwarg are removed. Use Parser().add_limits_kwarg

from v2.4.0 to v2.4.4

• fixed error where parse_die_within_limits failed when using default values for dice.

• Parser can parse strings with leading and trailing whitespaces.

• parse_die_within_limits now raises LimitsError

• added max_power_for_commaed option to EventsCalculations.full_table_string.

• added max_power_for_commaed and min_power_for_fixed_pt to EventsCalculations.stats_strings.

since v2.2.0

• Improved ExplodingOn speed.

• Added parse_die_within_limits function to parser. Also added limit values. Changed getters to properties.

since v2.1.0

• EventsCalculations added functions log10_points and log10_axes

• New dice: Exploding(other_die, explosions=2), ExplodingOn(other_die, explodes_on, explosions=2)

• see The Dice. and Events info for details

• New object: Parser - It converts strings to dice objects.