我一直收到错误消息“没有足够的值来解包（预期2，得到1）
下面是代码：

def gap(): # generates a bunch of blank lines in the console to hide previous moves
    for i in range(30):
        print("")

def grid(): # The Grid that the game is in
    t = [] # the name of the actual grid list
    grid_size = 10 # self explanitory
    for i in range(grid_size): # this is called a for loop
        row = []
        for q in range(grid_size):
            row.append(" ")
        t.append(row)

    def move_player_1():      
      while True:
        gap()
        for i in range(len(t)):# this is called a for loop
            print(t[i])
            print('')
          #try:
        print("Choose what Ship to place")
        print('')
        print('')
        print("Write '2' for two long ship")
        print('')
        print("Write '3' for three long ship")
        print('')
        print("Write '4' for four long ship")
        print('')
        print("Write '5' for five long ship")
        print('')
            
            
        ship_length = int(input("Your Ship choice:"))
            
        placement_chords = input("player 1 (place ships) eg: 1,7 : ")
        row, col = placement_chords.split(",") # divides "move" into separate integers for row and column
        print(row)
        print(col)
        
        counter = 0
        for i in range(ship_length):
          t[row][counter],[col] = "0"
          print(t)
          counter += 1

        row, col = placement_chords.split(",")
        row -= 1 # this just subtracts one to fix things, if a player selected  the coordanates "1,1" it would actully happen on 2,2 because lists are weird
        col -=1
          
        if t[row][col] == " ": # hit detection
            t[row][col] = "x"
        else:
            print("HIT!")
        gap()
  
        for i in range(len(t)):# this is called a for loop and it is printing the       board  
          print(t[i])
          
        return t
            
          #except ValueError:
            #print("You have done it wrong")
            #time.sleep(2)
    
    move_player_1()#this is a definition
    
  
grid()

我期待相关的位置被填充为0，以充当战舰的舰船