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Accepted
Tony Stark
Asked:2020-08-15 18:00:31 +0800 CST2020-08-15 18:00:31 +0800 CST

在列表列表中搜索

  • 772

应在列表列表中查找从 1 到 9 输入的数字并返回 True 或 False 的函数无法正常工作。

board = [['7', '8', '9'], ['4', '5', '6'], ['1', '2', '3']]
location = input("select a number (1, 9):" )

def available(location, board):

for row in board:
    if location in row:
        return False
    else:
        return True

available(location, board)

请告诉我，我不明白出了什么问题。

python

1 个回答

  1. Best Answer

    问题是您在第一次迭代时退出。

    def available(location, board):
  """ Проверяет наличие location в board """
  for row in board:
    if location in row:
      return True
  return False
def available2(location, board):
  """ Проверяет отсутствие location в board """
  for row in board:
    if location in row:
      return False
  return True
def available_flat(location, board):
  """ Проверяет наличие location в board, разворачивая список в плоский """
  return location in [item for sub in board for item in sub]


board = [['7', '8', '9'], ['4', '5', '6'], ['1', '2', '3']]
location = input("select a number (1, 9):" )
available(location, board)
    • 2

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