Code examples for writing snake games in Python-Python Tutorial-php.cn

Code examples for writing snake games in Python

Y2J

Release： 2017-04-27 09:24:31

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This article mainly introduces the writing code of the Python Snake game in detail. It has certain reference value. Interested friends can refer to it

I am learning Python recently and want to do something. Let’s practice. Snake on the command line is usually a C practice project, but I couldn’t find anything else for a while, so I made a snake first to practice simple grammar.

Since it is troublesome to monitor the keyboard in Python and there is no kbhit() in C language, this greedy snake will not move by itself. The running effect is as follows:

Requirements: Use # to represent the border, * to represent food, o to represent the snake's body, O to represent the snake's head, and use wsad to move

Python version: 3.6.1

System environment: Win10

Class:

board: chessboard, which is the game area

snake: greedy snake, by recording each body Click to record the status of the snake

Game: Game category

I originally wanted a food class, but food only needs one coordinate and a new one, so I simply use a list to save the coordinates. Putting the new food in the game is not a big problem logically

Source code:

# Write By Guobao
# 2017/4//7
#
# 贪吃蛇
# 用#做边界，*做食物，o做身体和头部
# python 3.6.1
import copy
import random
import os
import msvcrt

# the board class, used to put everything
class board:

  __points =[]

  def __init__(self):
    self.__points.clear()
    for i in range(22):
      line = []
      if i == 0 or i == 21:
        for j in range(22):
          line.append(&#39;#&#39;)
      else:
        line.append(&#39;#&#39;)
        for j in range(20):
          line.append(&#39; &#39;)
        line.append(&#39;#&#39;)
      self.__points.append(line)

  def getPoint(self, location):
    return self.__points[location[0]][location[1]]

  def clear(self):
    self.__points.clear()
    for i in range(22):
      line = []
      if i == 0 or i == 21:
        for j in range(22):
          line.append(&#39;#&#39;)
      else:
        line.append(&#39;#&#39;)
        for j in range(20):
          line.append(&#39; &#39;)
        line.append(&#39;#&#39;)
      self.__points.append(line)

  def put_snake(self, snake_locations):
    # clear the board
    self.clear()

    # put the snake points
    for x in snake_locations:
      self.__points[x[0]][x[1]] = &#39;o&#39;

    # the head
    x = snake_locations[len(snake_locations) - 1]
    self.__points[x[0]][x[1]] = &#39;O&#39;

  def put_food(self, food_location):
    self.__points[food_location[0]][food_location[1]] = &#39;*&#39;

  def show(self):
    os.system("cls")
    for i in range(22):
      for j in range(22):
        print(self.__points[i][j], end=&#39;&#39;)
      print()

# the snake class
class snake:
  __points = []

  def __init__(self):
    for i in range(1, 6):
      self.__points.append([1, i])

  def getPoints(self):
    return self.__points

  # move to the next position
  # give the next head
  def move(self, next_head):
    self.__points.pop(0)
    self.__points.append(next_head)

  # eat the food
  # give the next head
  def eat(self, next_head):
    self.__points.append(next_head)

  # calc the next state
  # and return the direction
  def next_head(self, direction=&#39;default&#39;):

    # need to change the value, so copy it
    head = copy.deepcopy(self.__points[len(self.__points) - 1])

    # calc the "default" direction
    if direction == &#39;default&#39;:
      neck = self.__points[len(self.__points) - 2]
      if neck[0] > head[0]:
        direction = &#39;up&#39;
      elif neck[0] < head[0]:
        direction = &#39;down&#39;
      elif neck[1] > head[1]:
        direction = &#39;left&#39;
      elif neck[1] < head[1]:
        direction = &#39;right&#39;

    if direction == &#39;up&#39;:
      head[0] = head[0] - 1
    elif direction == &#39;down&#39;:
      head[0] = head[0] + 1
    elif direction == &#39;left&#39;:
      head[1] = head[1] - 1
    elif direction == &#39;right&#39;:
      head[1] = head[1] + 1
    return head

# the game
class game:

  board = board()
  snake = snake()
  food = []
  count = 0

  def __init__(self):
    self.new_food()
    self.board.clear()
    self.board.put_snake(self.snake.getPoints())
    self.board.put_food(self.food)

  def new_food(self):
    while 1:
      line = random.randint(1, 20)
      column = random.randint(1, 20)
      if self.board.getPoint([column, line]) == &#39; &#39;:
        self.food = [column, line]
        return

  def show(self):
    self.board.clear()
    self.board.put_snake(self.snake.getPoints())
    self.board.put_food(self.food)
    self.board.show()


  def run(self):
    self.board.show()

    # the &#39;w a s d&#39; are the directions
    operation_dict = {b&#39;w&#39;: &#39;up&#39;, b&#39;W&#39;: &#39;up&#39;, b&#39;s&#39;: &#39;down&#39;, b&#39;S&#39;: &#39;down&#39;, b&#39;a&#39;: &#39;left&#39;, b&#39;A&#39;: &#39;left&#39;, b&#39;d&#39;: &#39;right&#39;, b&#39;D&#39;: &#39;right&#39;}
    op = msvcrt.getch()

    while op != b&#39;q&#39;:
      if op not in operation_dict:
        op = msvcrt.getch()
      else:
        new_head = self.snake.next_head(operation_dict[op])

        # get the food
        if self.board.getPoint(new_head) == &#39;*&#39;:
          self.snake.eat(new_head)
          self.count = self.count + 1
          if self.count >= 15:
            self.show()
            print("Good Job")
            break
          else:
            self.new_food()
            self.show()

        # 反向一Q日神仙
        elif new_head == self.snake.getPoints()[len(self.snake.getPoints()) - 2]:
          pass

        # rush the wall
        elif self.board.getPoint(new_head) == &#39;#&#39; or self.board.getPoint(new_head) == &#39;o&#39;:
          print(&#39;GG&#39;)
          break

        # normal move
        else:
          self.snake.move(new_head)
          self.show()
      op = msvcrt.getch()

game().run()

Copy after login

Notes:

1. Python does not have a Switch case statement, so you can use dirt to implement

2. Python’s = sign is copy, copy reference, and deep copy needs to use copy’s deepcopy() function to implement

3 .Even within a member function, you need to use self to access member variables, which is very different from C++ and JAVA

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