Create player class, implement some prompt methods

blackjack.py

@@ -1,9 +1,62 @@
+from decimal import Decimal
+
+from player import Player
+from utils import get_integer_input
 
 class BlackJack():
 
+    # The starting amount of money for each player, in dollars
+    DEFAULT_START_DOLLARS = Decimal(1000)
+
     def play(self):
-        pass
+        """
+        The entrypoint for the Blackjack class. Play the game!
+        """
+
+        # Get the number of players we want to play with
+        num_players = self.ask_num_players()
+        if num_players == 0:
+            # No players :) Game is over!
+            print('Cool, you decided to go touch grass instead. Game over!')
+            return
+
+        players = [Player(player_number=i+1, start_dollars=self.DEFAULT_START_DOLLARS)
+                   for i in range(num_players)]
+        self.get_bet(player=players[0])
+
+    def get_bet(self, player: Player):
+        """
+        Prompts the user to enter a bet amount as an integer, and returns the amount
+        once an integer is input.
+
+        Args:
+            player (Player): The player for which to get the bet
+
+        Returns:
+            int: The number of dollars input
+        """
+        blurb = ('Place bet for player {}. Input must be an integer. ${} remaining'
+                 .format(player.player_number, player.dollars_remaining))
+        prompt = '$: '
+        input_amt = get_integer_input(blurb=blurb, prompt=prompt)
+        while input_amt > player.dollars_remaining:
+            blurb = ('Insufficent balance. Enter an amount < ${} for player {}'
+                     .format(player.dollars_remaining, player.player_number))
+            input_amt = get_integer_input(blurb=blurb, prompt=prompt)
+
+        return input_amt
+
+    def ask_num_players(self) -> int:
+        """
+        Asks the user to input the number of players, and returns the result
+        once an integer is input.
 
+        Returns:
+            int: The number of players
+        """
+        blurb = 'How many players do you want to play with? Input must be an integer.'
+        prompt = '#: '
+        return get_integer_input(blurb=blurb, prompt=prompt)
 
 if __name__ == "__main__":
     game = BlackJack()

player.py

@@ -0,0 +1,11 @@
+
+from decimal import Decimal
+
+class Player():
+
+    def __init__(self, player_number: int, start_dollars: Decimal):
+        """
+        Create a player with the given starting amount of money,
+        """
+        self.player_number = player_number
+        self.dollars_remaining = start_dollars

utils.py

@@ -0,0 +1,19 @@
+
+def get_integer_input(blurb: str, prompt: str):
+    """
+    Prompts the user to enter a bet amount as an integer, and returns the amount
+    once an integer is input.
+
+    Args:
+        blurb (str): The string printed before input
+        prompt (str): The string printed on the same line as the input
+
+    Returns:
+        [int]: The integer the user input
+    """
+    input_amt = None
+    print(blurb)
+    while input_amt is None or not input_amt.isnumeric():
+        input_amt = input(prompt)
+
+    return int(input_amt)