#Half In

<!-- language-all: lang-py -->

This bot always bids half of what it has left, except in the final round where it will go all in.

    class half_in:
      def __init__(self):
        self.money = 0
        self.round = -1
      def play_round(self, winner, win_amount):
        # Default actions:
        #  Collect 500 dollars
        self.money += 500
        #  If it was the winner: subtract the win_amount from his money
        if winner == 0:
          self.money -= win_amount
        #  One round further
        self.round += 1

        # If it's the final round: bid all in
        if self.round == 9:
          return self.money
        # Else: Bid half what it has left:
        return self.money / 2

I never program in Python, so if you see any mistakes let me know..