Question

我为hw制作了一个用于python的2D棋盘游戏。

我让用户为电路板尺寸输入一个整数。例如，7。我在发布之前修改了一下（仅显示重要的内容）。功能如下

def asksize():           
    while True:
        ask=raw_input("Input board size: ")  
        try:
            size=int(ask)
            return size

        except ValueError: 
            print "Please enter a integer"

因为它是可变的板大小，我需要在其他函数中重用变量大小，用它来检查用户的移动是否有效，如何重用变量？

def checkmove(move):    
    #move is sth like eg. A1:B2
    move=move.split(":") #I split it so it becomes ['A','1']['B','2']  
    if size>=int(move[0][1]) and int(move[0][1])>=1 and size>=int(move[1][1]) and int(move[1][1])>=1: #for example if board size is 7, this is to check whether user input is between 1 to 7 within the board
        return True
    else:
        return False

在我的checkmove函数中，我不能在我的参数中使用size，因为它没有定义，我怎样才能使它可行？

由于

Answer 1

将变量大小设为全局是一个选项，但您应该将您的函数视为API，并在游戏主要部分上使用它们。

所以存储输入如下：

size = asksize() #store the data on to variable called size
#then just call your check move
checkmove(x)

无论如何这是一个糟糕的练习，最好通过游戏代码中的函数传递变量：

#definitions
def asksize():
    #your code here
def checkmove(move, size):
    #your code here


#game set up here
size = asksize()
#more set up stuff
#end of game set up
#Game Main code

while True: #main game bucle
#Game stuff here
checkmove(move, size)
#more game stuff

Answer 2

考虑创建一个代表董事会的类。那么size自然就是一个实例变量

class Board(object):

    def asksize(self):           
        while True:
            ask=raw_input("Input board size: ")  
            try:
                self.size=int(ask)
                return        
            except ValueError: 
                print "Please enter a integer"   

    def checkmove(self, move):    
        #move is sth like eg. A1:B2
        move=move.split(":") #I split it so it becomes ['A','1']['B','2']  
        if self.size>=int(move[0][1]) and int(move[0][1])>=1 and self.size>=int(move[1][1]) and int(move[1][1])>=1: #for example if board size is 7, this is to check whether user input is between 1 to 7 within the board
            return True
        else:
            return False 


# Use it like this
board = Board()
board.asksize()
move = some_function_that_returns_a_move()
board.checkmove(move)

Answer 3

你（至少）有两个选择：

将size作为checkmove函数中的参数传递。
在size= asksize()函数中调用checkmove。

我认为将大小作为参数传递更有意义，因为那时你可以为AI播放器重用相同的功能......

那是：

def checkmove(move, size):
    # rest of definition

# main bit of code

size = asksize()
checkmove(move, size)

Answer 4

或简单地制作＆＃39;尺寸＆＃39;作为全局变量，无论如何，python将在下一个更高的范围内搜索变量。你可以尝试这样：

size = 0
def asksize():
    global size
    while True:
        ask=raw_input("Input board size: ")
        try:
            size=int(ask)
            return size

        except ValueError:
            print "Please enter a integer"


def checkmove(move):
    global size
    # move is sth like eg. A1:B2
    move = move.split(":")  # I split it so it becomes ['A','1']['B','2']  
    if size >= int(move[0][1]) and int(move[0][1]) >= 1 and size >= int(move[1][1]) and int(move[1][
                                                                                                1]) >= 1:  # for example if board size is 7, this is to check whether user input is between 1 to 7 within the board
        return True
    else:
        return False

如何在其他函数中重用用户的原始输入

4 个答案: