Python Koans

# Python Koans.md

Python Koans

Python Koans is an interactive tutorial for learning the Python programming language by making tests pass.
— https://github.com/gregmalcolm/python_koans

1. About Scoring Project - Greed Dice Game

about_scoring_project_v1.py

# -*- coding: utf-8 -*-

# Greed is a dice game where you roll up to five dice to accumulate
# points.  The following "score" function will be used calculate the
# score of a single roll of the dice.
#
# A greed roll is scored as follows:
#
# * A set of three ones is 1000 points
#
# * A set of three numbers (other than ones) is worth 100 times the
#   number. (e.g. three fives is 500 points).
#
# * A one (that is not part of a set of three) is worth 100 points.
#
# * A five (that is not part of a set of three) is worth 50 points.
#
# * Everything else is worth 0 points.
#
#
# Examples:
#
# score([1,1,1,5,1]) => 1150 points
# score([2,3,4,6,2]) => 0 points
# score([3,4,5,3,3]) => 350 points
# score([1,5,1,2,4]) => 250 points

def score(dice):
    counts = {}

    for die in dice:
        counts[f"_{die}"] = counts.get(f"_{die}", 0) + 1

    return (lambda _1=0, _2=0, _3=0, _4=0, _5=0, _6=0: (
        _1 // 3 * 1e3 + _1 % 3 * 1e2 + _5 % 3 * 50 +
        (
            _2 // 3 * 2 +
            _3 // 3 * 3 +
            _4 // 3 * 4 +
            _5 // 3 * 5 +
            _6 // 3 * 6
        ) * 1e2
    ))(**counts)

about_scoring_project_v2.py

# -*- coding: utf-8 -*-

# Greed is a dice game where you roll up to five dice to accumulate
# points.  The following "score" function will be used calculate the
# score of a single roll of the dice.
#
# A greed roll is scored as follows:
#
# * A set of three ones is 1000 points
#
# * A set of three numbers (other than ones) is worth 100 times the
#   number. (e.g. three fives is 500 points).
#
# * A one (that is not part of a set of three) is worth 100 points.
#
# * A five (that is not part of a set of three) is worth 50 points.
#
# * Everything else is worth 0 points.
#
#
# Examples:
#
# score([1,1,1,5,1]) => 1150 points
# score([2,3,4,6,2]) => 0 points
# score([3,4,5,3,3]) => 350 points
# score([1,5,1,2,4]) => 250 points

def score(dice):
    # You need to write this method
    dice_counts = Counter(dice)
    total_score = 0
    SET_MAX_VAL = 3  # A set is 3 items

    for die, count in dice_counts.items():
        value = 1000 if die is 1 else die * 100
        total_score += value * (count // SET_MAX_VAL)

    total_score += (dice_counts.get(1, 0) % 3) * 100
    total_score += (dice_counts.get(5, 0) % 3) * 50

    return total_score