| 1 | 1 | class BowlingGame: |
| 2 | 2 | def __init__(self): |
| 3 | | pass |
| 4 | | |
| 3 | """ |
| 4 | Initialize a new bowling game. |
| 5 | """ |
| 6 | self.rolls = [] |
| 7 | self.current_roll = 0 |
| 8 | |
| 5 | 9 | def roll(self, pins): |
| 6 | | pass |
| 7 | | |
| 10 | """ |
| 11 | Record a roll in the game. |
| 12 | |
| 13 | Args: |
| 14 | pins (int): Number of pins knocked down in this roll. |
| 15 | |
| 16 | Raises: |
| 17 | ValueError: If the number of pins is invalid. |
| 18 | """ |
| 19 | # Edge Case: Invalid pin count (negative or more than 10) |
| 20 | if pins < 0: |
| 21 | raise ValueError("Pins cannot be negative") |
| 22 | if pins > 10: |
| 23 | raise ValueError("Pins cannot be more than 10") |
| 24 | |
| 25 | # Edge Case: Too many pins in a frame |
| 26 | # Only validate for non-strike frames (where there are two rolls) |
| 27 | if (self.current_roll > 0 and |
| 28 | self.current_roll % 2 == 1 and # Second roll in a frame |
| 29 | self.rolls[-1] != 10 and # Previous roll was not a strike |
| 30 | self.rolls[-1] + pins > 10): # Sum exceeds 10 pins |
| 31 | raise ValueError("Pins cannot be more than 10 in a frame") |
| 32 | |
| 33 | # Edge Case: Game already completed |
| 34 | if self.is_game_complete(): |
| 35 | raise ValueError("Game has ended") |
| 36 | |
| 37 | self.rolls.append(pins) |
| 38 | self.current_roll += 1 |
| 39 | |
| 8 | 40 | def score(self): |
| 9 | | pass |
| 41 | """ |
| 42 | Calculate the total score for the game. |
| 43 | |
| 44 | Returns: |
| 45 | int: The total score of the game. |
| 46 | |
| 47 | Raises: |
| 48 | ValueError: If the game is not yet complete. |
| 49 | """ |
| 50 | # Edge Case: Game not complete |
| 51 | if not self.is_game_complete(): |
| 52 | raise ValueError("Game has not ended yet") |
| 53 | |
| 54 | total_score = 0 |
| 55 | roll_index = 0 |
| 56 | |
| 57 | for frame in range(10): |
| 58 | # Edge Case: Strike in frames 1-9 |
| 59 | if self.is_strike(roll_index) and frame < 9: |
| 60 | total_score += 10 + self.strike_bonus(roll_index) |
| 61 | roll_index += 1 |
| 62 | # Edge Case: Spare in frames 1-9 |
| 63 | elif self.is_spare(roll_index) and frame < 9: |
| 64 | total_score += 10 + self.spare_bonus(roll_index) |
| 65 | roll_index += 2 |
| 66 | # Edge Case: Open frame in frames 1-9 |
| 67 | elif frame < 9: |
| 68 | total_score += self.sum_of_balls_in_frame(roll_index) |
| 69 | roll_index += 2 |
| 70 | # Edge Case: Tenth frame handling |
| 71 | else: # frame == 9 |
| 72 | # Edge Case: Strike in tenth frame |
| 73 | if self.is_strike(roll_index): |
| 74 | # Edge Case: Second roll is also a strike |
| 75 | if self.is_strike(roll_index + 1): |
| 76 | # Edge Case: Third roll is also a strike |
| 77 | total_score += 30 if self.is_strike(roll_index + 2) else 20 + self.rolls[roll_index + 2] |
| 78 | else: |
| 79 | total_score += 10 + self.rolls[roll_index + 1] + self.rolls[roll_index + 2] |
| 80 | # Edge Case: Spare in tenth frame |
| 81 | elif self.is_spare(roll_index): |
| 82 | total_score += 10 + self.rolls[roll_index + 2] |
| 83 | # Edge Case: Open tenth frame |
| 84 | else: |
| 85 | total_score += self.sum_of_balls_in_frame(roll_index) |
| 86 | |
| 87 | # Edge Case: Invalid number of rolls in tenth frame |
| 88 | if len(self.rolls) != roll_index + (3 if self.is_strike(roll_index) or self.is_spare(roll_index) else 2): |
| 89 | raise ValueError("Invalid number of rolls in tenth frame") |
| 90 | |
| 91 | return total_score |
| 92 | |
| 93 | def is_game_complete(self): |
| 94 | """ |
| 95 | Check if the game is complete. |
| 96 | |
| 97 | Returns: |
| 98 | bool: True if the game is complete, False otherwise. |
| 99 | """ |
| 100 | # Need at least 10 frames worth of rolls |
| 101 | if len(self.rolls) < 10: |
| 102 | return False |
| 103 | |
| 104 | # Check if we have completed 10 frames |
| 105 | frame = 0 |
| 106 | roll_index = 0 |
| 107 | |
| 108 | # Process first 9 frames |
| 109 | while frame < 9 and roll_index < len(self.rolls): |
| 110 | if self.is_strike(roll_index): |
| 111 | roll_index += 1 |
| 112 | else: |
| 113 | if roll_index + 1 < len(self.rolls): |
| 114 | roll_index += 2 |
| 115 | else: |
| 116 | # Not enough rolls to complete this frame |
| 117 | return False |
| 118 | frame += 1 |
| 119 | |
| 120 | # If we haven't completed 9 frames, game is not complete |
| 121 | if frame < 9: |
| 122 | return False |
| 123 | |
| 124 | # Process 10th frame |
| 125 | if roll_index >= len(self.rolls): |
| 126 | return False |
| 127 | |
| 128 | # 10th frame - special handling |
| 129 | if self.is_strike(roll_index): # First roll is a strike |
| 130 | # Need two more rolls |
| 131 | if roll_index + 2 >= len(self.rolls): |
| 132 | return False |
| 133 | # Game is complete with 3 rolls in 10th frame |
| 134 | return True |
| 135 | else: |
| 136 | # First roll is not a strike |
| 137 | if roll_index + 1 >= len(self.rolls): |
| 138 | return False |
| 139 | |
| 140 | # Check if it's a spare |
| 141 | if self.is_spare(roll_index): |
| 142 | # Need one more roll |
| 143 | if roll_index + 2 >= len(self.rolls): |
| 144 | return False |
| 145 | # Game is complete with 3 rolls in 10th frame |
| 146 | return True |
| 147 | else: |
| 148 | # Open frame - just need 2 rolls |
| 149 | if roll_index + 1 >= len(self.rolls): |
| 150 | return False |
| 151 | # Game is complete with 2 rolls in 10th frame |
| 152 | return True |
| 153 | |
| 154 | return False |
| 155 | |
| 156 | def is_strike(self, roll_index): |
| 157 | """ |
| 158 | Check if a roll is a strike. |
| 159 | |
| 160 | Args: |
| 161 | roll_index (int): Index of the roll to check. |
| 162 | |
| 163 | Returns: |
| 164 | bool: True if the roll is a strike, False otherwise. |
| 165 | """ |
| 166 | return roll_index < len(self.rolls) and self.rolls[roll_index] == 10 |
| 167 | |
| 168 | def is_spare(self, roll_index): |
| 169 | """ |
| 170 | Check if a frame is a spare. |
| 171 | |
| 172 | Args: |
| 173 | roll_index (int): Index of the first roll in the frame. |
| 174 | |
| 175 | Returns: |
| 176 | bool: True if the frame is a spare, False otherwise. |
| 177 | """ |
| 178 | return (roll_index + 1 < len(self.rolls) and |
| 179 | self.rolls[roll_index] + self.rolls[roll_index + 1] == 10) |
| 180 | |
| 181 | def strike_bonus(self, roll_index): |
| 182 | """ |
| 183 | Calculate the bonus for a strike. |
| 184 | |
| 185 | Args: |
| 186 | roll_index (int): Index of the strike roll. |
| 187 | |
| 188 | Returns: |
| 189 | int: The bonus points for the strike. |
| 190 | """ |
| 191 | # Edge Case: Not enough rolls for bonus calculation |
| 192 | if roll_index + 2 >= len(self.rolls): |
| 193 | return 0 |
| 194 | return self.rolls[roll_index + 1] + self.rolls[roll_index + 2] |
| 195 | |
| 196 | def spare_bonus(self, roll_index): |
| 197 | """ |
| 198 | Calculate the bonus for a spare. |
| 199 | |
| 200 | Args: |
| 201 | roll_index (int): Index of the first roll in the spare frame. |
| 202 | |
| 203 | Returns: |
| 204 | int: The bonus points for the spare. |
| 205 | """ |
| 206 | # Edge Case: Not enough rolls for bonus calculation |
| 207 | if roll_index + 2 >= len(self.rolls): |
| 208 | return 0 |
| 209 | return self.rolls[roll_index + 2] |
| 210 | |
| 211 | def sum_of_balls_in_frame(self, roll_index): |
| 212 | """ |
| 213 | Calculate the sum of pins knocked down in a frame. |
| 214 | |
| 215 | Args: |
| 216 | roll_index (int): Index of the first roll in the frame. |
| 217 | |
| 218 | Returns: |
| 219 | int: The sum of pins knocked down in the frame. |
| 220 | """ |
| 221 | # Edge Case: Not enough rolls in frame |
| 222 | if roll_index + 1 >= len(self.rolls): |
| 223 | return self.rolls[roll_index] if roll_index < len(self.rolls) else 0 |
| 224 | return self.rolls[roll_index] + self.rolls[roll_index + 1] |
| 225 | |
| 226 | # Handled Edge Cases: Invalid pin count, too many pins in a frame, game already completed |
| 227 | # Handled Edge Cases: Game not complete, strike in frames 1-9, spare in frames 1-9, open frame in frames 1-9, strike in tenth frame, spare in tenth frame, open tenth frame, invalid number of rolls in tenth frame |
| 228 | # Handled Edge Cases: Not enough rolls for bonus calculation |
| 229 | # Handled Edge Cases: Not enough rolls in frame |