API Reference

Import the xdice library with import dice

The dice module


Similar to xdice.Pattern(pattern_string).compile()


Similar to xdice.Pattern(pattern_string).roll()

dice.rolldice(faces, amount=1, drop_lowest=0, drop_highest=0)

Similar to xdice.Dice(faces, amount, drop_lowest, drop_highest).roll()

Dice class

Set of dice.

Dice.__init__ (sides, amount=1, drop_lowest=0, drop_highest=0)

Instantiate a set of dice.


  • dice.sides: number of sides of the dice
  • dice.amount: amount of dice to roll
  • dice.drop_lowest: amount of lowest scores to drop
  • dice.drop_highest: amount of highest scores to drop
  • dice.name : Descriptive name of the Dice object


Role the dice and return a Score object

[classmethod] Dice.parse(cls, pattern)

Parse a pattern of the form ‘AdX’, where A and X are positive integers, then return the corresponding Dice object. Use ‘AdX[Ln][Hn]’ to drop the n lowest and/or highest dice when rolled.

Score class

Score is a subclass of integer, you can then manipulate it as you would do with an integer.

It also provides an access to the detailed score with the property ‘detail’.
‘detail’ is the list of the scores obtained by each dice.

Score class can also be used as an iterable, to walk trough the individual scores.

    >>> s = Score([1,2,3])
    >>> print(s)
    >>> s + 1
    >>> list(s)

Score.__new__(iterable, dropped=[], name=’‘)

iterable should only contain integers

Score value will be the sum of the list’s values.


  • score.detail: similar to list(score), return the list of the individual results
  • score.name: descriptive name of the dice rolled
  • score.dropped: list of the dropped results


A formatted string describing the detailed result.

Pattern class

Dice notation pattern.

Pattern.__init__ (instr)

Instantiate a Pattern object.


Parse the pattern. Two properties are updated at this time:
  • pattern.format_string

    The ready-to-be-formatted string built from the instr argument.

    Eg: ‘1d6+4+1d4’ => ‘{0}+4-{1}’

  • pattern.dices

    The list of parsed dice.

    Eg: ‘1d6+4+1d4’ => [(Dice; sides=6;amount=1), (Dice; sides=4;amount=1)]


Compile the pattern if it has not been yet, then roll the dice.

Return a PatternScore object.

PatternScore class

PatternScore is a subclass of integer, you can then manipulate it as you would do with an integer.

Moreover, you can get the list of the scores with the score(i) or scores() methods, and retrieve a formatted result with the format() method.


Returns the list of Score objects extracted from the pattern and rolled.


A formatted string describing the detailed result.