geekcomputers/Python · warning · ValueError

Dealer BUST

Error message

Dealer BUST

What it means

Raised in card_manage after the player successfully hits and the dealer's strategy_trigger draw pushes the dealer's total over 21. Signals the dealer busted, so the player wins the round. It is an expected game-outcome signal implemented as an exception.

Source

Thrown at BlackJack_game/blackjack_simulate.py:554

        if self.choice == "Double-down":
            try:
                self.player.chips.double_bet()
            except ValueError as e:
                print(e)
        self.player.refresh_prompt()
        if self.choice in ("Insurance", "Double-down", "Surrender"):
            self.go_on = False

    def card_manage(self):
        if self.choice in ("Hit", "Double-down"):
            self.player.obtain_card(self.deck)
            if self.player.is_point(">", BLACK_JACK):
                raise ValueError("Player BUST")
            else:
                self.dealer.strategy_trigger(self.deck)
                if self.dealer.is_point(">", BLACK_JACK):
                    raise ValueError("Dealer BUST")
        elif self.choice != "Surrender":
            if not self.player.chips.is_insurance:
                self.dealer.strategy_trigger(self.deck)
                if self.dealer.is_point(">", BLACK_JACK):
                    raise ValueError("Dealer BUST")

        self.dealer.showing()
        self.player.showing()
        if self.choice in ("Double-down", "Stand"):
            self.go_on = False

    def is_surrender(self):
        if self.choice == "Surrender":
            self.player.speak("Sorry, I surrender....\n")

    def get_winner(self):
        if self.bust:
            return "Dealer" if self.player.is_point(">", BLACK_JACK) else "Player"

View on GitHub (pinned to 40f4cd2652)

Solutions

1. Catch ValueError around card_manage in the play loop and settle as a player win when the message is 'Dealer BUST'
2. Distinguish player vs dealer bust by inspecting the message or using separate exception types
3. Ensure the outer game loop continues to the next round after settlement

Example fix

// before
self.card_manage()
// after
try:
    self.card_manage()
except ValueError as e:
    win = 'Dealer' in str(e)
    self.settle(player_wins=win)

try:
    self.card_manage()
except ValueError as e:
    if 'Dealer BUST' in str(e):
        self.settle(player_wins=True)

When it happens

Trigger: Player chooses Hit/Double-down, does not bust, then dealer.strategy_trigger(deck) draws cards per dealer rules until the dealer exceeds 21, triggering is_point('>', BLACK_JACK).

Common situations: Dealer forced to hit on 16 and drawing a face card; simulations that don't catch the error will abort the whole game loop.

Related errors

• Player BUST
• Not enough chips
• Your integer should bigger than 0
• Your chips should between 1 -
• Parameter n must be greater or equal to one.

AI-assisted analysis of geekcomputers/Python@40f4cd2652 (2026-08-27). Data as JSON: /api/errors/43b56c196e7a4f48. Report an issue: GitHub.