英文:
Why does my variable (winning) not get reassigned when I try to reassign it?
问题
def winningcheck(board):winning = ''if board[1] == board[2] == board[3]:print('游戏已经获胜')winning = 'True'else:print('游戏尚未获胜')test = ['#', 'X', 'X', 'X', ' ', ' ', ' ', ' ', ' ', ' ']winningcheck(test)print(winning)
英文:
def winningcheck(board):winning == ''if board[1] == board[2] == board[3]:print('The game has been won')winning == 'True'else:print('The game has not been won')test = ['#', 'X ', 'X ', 'X ', ' ', ' ', ' ', ' ', ' ', ' ']winningcheck(test)print(winning)
I'm a beginner, but I expected the variable winning to be reassigned to 'true' when the 'if' condition was met. However, it just returns an empty string instead when I try to print the variable.
答案1
得分: 1
你在代码中使用了winning==而不是winning='True'，这是一个条件判断而不是赋值操作。
另外，你需要将winning声明为全局变量，就像我所示范的那样，否则函数外部的代码无法访问它。
winning = ''def winningcheck(board):global winningif board[1] == board[2] == board[3]:print('游戏已经赢了')winning = 'True'else:print('游戏尚未赢得')test = ['#', 'X ', 'X ', 'X ', ' ', ' ', ' ', ' ', ' ', ' ']winningcheck(test)print(winning)
但是，你应该使用布尔变量来表示winning，而不是字符串，因为这更有效率，也更符合你的意图。
所以你应该初始化winning = False，然后使用winning = True来修改它。
英文:
You did winning== instead of winning='True', this was a condition and not an assignment.<br>
Additionally you need to make winning a global variable as I've shown. otherwise the code outisde the function can't access it.
winning = ''def winningcheck(board):global winningif board[1] == board[2] == board[3]:print('The game has been won')winning = 'True'else:print('The game has not been won')test = ['#', 'X ', 'X ', 'X ', ' ', ' ', ' ', ' ', ' ', ' ']winningcheck(test)print(winning)
But you should use a boolean variable for winning instead of a string, as its more efficient and it serves the intended use for you.<br>
So you would init winning = False and change with winning = True.
答案2
得分: 0
Comparison:
winning == 'True'
Assignment:
winning = True
注意不同数量的 "=" 符号。
英文:
Comparison:
winning == 'True'
Assignment:
winning = True
Note the different number of "=".
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