类型错误:序列项 0:预期的字符串，找到 NoneType [英] TypeError: sequence item 0: expected string, NoneType found
问题描述
我正在尝试改进战舰游戏.原始版本工作正常，没有错误.我编写了代码来帮助克服第一个版本每次都将船只放在同一个地方的事实，所以我从一艘船(由两个方块组成)开始.我通过创建两个函数来做到这一点:第一个生成一个随机坐标...
I'm trying to improve a game of battleships. The original version works fine with no errors. I have written code to help overcome the fact that the first version places the ships in the same place every time so I have started with one ship (made of two squares). I have done this by creating two functions: the first generates a random coordinate...
# Destroyer (2 squares)
def Deploy_Destroyer_1(Player):
rand_col_1 = randint(0,11)
if rand_col_1 <= 5:
rand_row_1 = randint(0,11)
else:
rand_row_1 = randint(6,11)
return rand_col_1
return rand_row_1
if Player[rand_row_1][rand_col_1] == 'X':
Deploy_Destroyer_1(Player)
else:
Deploy_Destroyer_2(Player)
第二次试验根据条件进行协调(如果它适合板上以及它可以放置哪个旋转).
and the second trials this co-ordinate against the conditions (if it will fit on the board and which rotation it can be placed).
def Deploy_Destroyer_2(Player):
if rand_col_1 == 5 and rand_row_1 == 6:
#can be 1, 2, 3 or 4... in that order below
rand_position_1 = randint(1,4)
if rand_position_1 == 1:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 + 1][rand_col_1] = 2
if rand_position_1 == 2:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 - 1][rand_col_1] = 2
if rand_position_1 == 3:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 + 1] = 2
if rand_position_1 == 4:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 - 1] = 2
elif rand_col_1 in range(1,4) and rand_row_1 in range(1,10):
#can be any 1, 2, 3 or 4... in that order below
rand_position_1 = randint(1,4)
if rand_position_1 == 1:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 + 1][rand_col_1] = 2
if rand_position_1 == 2:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 - 1][rand_col_1] = 2
if rand_position_1 == 3:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 + 1] = 2
if rand_position_1 == 4:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 - 1] = 2
elif rand_col_1 in range(5,10) and rand_row_1 in range(7,10):
#can be any 1, 2, 3 or 4... in that order below
rand_position_1 = randint(1,4)
if rand_position_1 == 1:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 + 1][rand_col_1] = 2
if rand_position_1 == 2:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 - 1][rand_col_1] = 2
if rand_position_1 == 3:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 + 1] = 2
if rand_position_1 == 4:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 - 1] = 2
elif rand_col_1 == 0 and rand_row_1 == 0:
#can be any 1, 2, 3 or 4... in that order below
rand_position_1 = randint(1,4)
if rand_position_1 == 1:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 + 1][rand_col_1] = 2
if rand_position_1 == 2:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 - 1][rand_col_1] = 2
if rand_position_1 == 3:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 + 1] = 2
if rand_position_1 == 4:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 - 1] = 2
elif (rand_col_1 == 5 and rand_row_1 == 0) or (rand_col_1 == 11 and rand_row_1 ==6):
#can be one or four
#check brackets and booleans here
rand_position_1 = randint(1,2)
if rand_position_1 == 1: #position 1
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 + 1][rand_col_1] = 2
if rand_position_1 == 2: #position 4
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 - 1] = 2
elif rand_col_1 == 0 and rand_row_1 == 11:
#can be 2 or 3
rand_position_1 = randint(2,3)
if rand_position_1 == 2: #position 2
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 - 1][rand_col_1] = 2
if rand_position_1 == 3: #position 3
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 + 1] = 2
elif rand_col_1 == 11 and rand_row_1 == 11:
#can be 2 or 4
rand_position_1 = randint(1,2)
if rand_position_1 == 1: #position 2
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 - 1][rand_col_1] = 2
if rand_position_1 == 2: #position 4
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 - 1] = 2
elif (rand_row_1 == 0 and rand_col_1 in range(1,4)) or (rand_row_1 == 6 and rand_col_1 in range(6,10)):
#can be 1, 3 or 4
#check brackets and booleans here
rand_position_1 = randint(1,3)
if rand_position_1 == 1: #position 1
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 + 1][rand_col_1] = 2
if rand_position_1 == 2: #position 3
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 + 1] = 2
if rand_position_1 == 3: #position 4
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 - 1] = 2
elif (rand_col_1 == 5 and rand_row_1 in range(1,5)) or (rand_col_1 == 11 and rand_row_1 in range(7,10)):
#can be 1, 2 or 4
#check brackets and booleans here
rand_position_1 = randint(1,3)
if rand_position_1 == 1: #position 1
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 + 1][rand_col_1] = 2
if rand_position_1 == 2: #position 2
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 - 1][rand_col_1] = 2
if rand_position_1 == 3: #position 4
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 - 1] = 2
elif rand_col_1 == 0 and rand_row_1 in range(1,10):
#can be 1, 2 or 3... in that order below
rand_position_1 = randint(1,3)
if rand_position_1 == 1:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 + 1][rand_col_1] = 2
if rand_position_1 == 2:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 - 1][rand_col_1] = 2
if rand_position_1 == 3:
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 + 1] = 2
elif rand_col_1 in range(1,10) and rand_row_1 == 11:
#can be 2, 3 or 4
rand_position_1 = randint(1,3)
if rand_position_1 == 2: #position 2
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1 - 1][rand_col_1] = 2
if rand_position_1 == 3: #position 3
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 + 1] = 2
if rand_position_1 == 4: #position 4
Player[rand_row_1][rand_col_1] = 2
Player[rand_row_1][rand_col_1 - 1] = 2
应用我的代码后，我收到此错误.
After applying my code I get this error.
Traceback (most recent call last):
File "<stdin>", line 310, in <module>
File "<stdin>", line 15, in PrintBoards
TypeError: sequence item 0: expected string, NoneType found
这里是PrintBoards函数
def PrintBoards(Player,Opponent):
print ' '*10, 'PLAYER', ' '*30, 'OPPONENT'
letters = ['A','B','C','D','E','F','G','H','I','J','K','L']
for x in range(6):
print letters[x]," ".join(map(DisplayChar,Player[x]))," "*18,"| "," ".join(map(DisplayChar,Opponent[x]))
for x in range(6,12):
print letters[x]," ".join(map(DisplayChar,Player[x]))," | "," ".join(map(DisplayChar,Opponent[x]))
print " "," ".join(map(str,range(1,10)))," 10 11 12"," "," ".join(map(str,range(1,10)))," 10 11 12"
这里是DisplayChar函数
def DisplayChar(x):
if x==0:
return '?'
elif x==1:
return ' '
elif x==2:
return 'X'
elif x==3:
return ' '
elif x==4:
return '*'
我尝试将上述函数编辑为此...
I tried editing the above function to this...
def DisplayChar(x):
if x==0:
return '?'
elif x==2:
return 'X'
elif x==4:
return '*'
else:
return ' '
但是它给了我这个错误
Traceback (most recent call last):
File "<stdin>", line 309, in <module>
File "<stdin>", line 15, in PrintBoards
TypeError: argument 2 to map() must support iteration
我还尝试在 PrintBoards 函数之后打印 Player 和 Opponent 列表，以确保它们包含 0 和 1(参考 DisplayChar 函数)，它们(当插入到原来的，而不是当我把我的新的很长的代码插入)
I also tried printing the lists Player and Opponent after the PrintBoards function to ensure that they contain 0s and 1s (referring to the DisplayChar function) which they do (when inserted into the original, not when I put my new and very long code in)
接下来是对迈克尔的回应
This next bit is in response to Michael
PLAYER OPPONENT
[[1, 1, 1, 1, 1, 1], [1, 2, 2, 2, 1, 1], [1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 2, 2, 2, 2, 1, 1], [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1], [1, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 1], [1, 2, 2, 2, 1, 2, 2, 2, 2, 1, 1, 1], [1, 2, 1, 2, 1, 2, 1, 1, 1, 1, 1, 1], [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]]
[0, 0, 0, 0, 0, 0]
A | ? ? ? ? ? ?
<function Deploy_Destroyer_1 at 0x1c2634>
[0, 0, 0, 0, 0, 0]
B
Traceback (most recent call last):
File "<stdin>", line 314, in <module>
File "<stdin>", line 17, in PrintBoards
TypeError: argument 2 to map() must support iteration
有人好心指出我分配了函数而不是调用它后，我发现发生了另一个错误(我认为Python不喜欢我)
After someone kindly pointed out I had assigned the function instead of called it, I've found that another error occurred (I don't think Python likes me)
Traceback (most recent call last):
File "<stdin>", line 313, in <module>
File "<stdin>", line 17, in PrintBoards
TypeError: argument 2 to map() must support iteration
下面我还包括了我调用函数的地方，以防我做了一些愚蠢的事情
Below I've also included where I called the function in case I've done something silly
Player, Opponent = InitBoards()
Player = DeployFleet(Player), Deploy_Destroyer_1(Player)
PrintBoards(Player,Opponent)
我把它改成 Micheal0x2a 所说的，它运行没有错误但是代码放置的船消失了
I changed it to what Micheal0x2a said and it ran with no errors however the ship that the code is placing disappeared
据我所知，PrintBoards 函数通过将列表中的项目映射到 DisplayChar 函数(如果 2 是列表中的一个项目，则打印 X 等).所以我的新手知识告诉我，应该在Main 函数中的Player = 中调用Deploy_Destroyer_1 函数(上面包含)以确保项目列表中的内容已更改，因此打印的字符应更改.
From what I understand, the PrintBoards function prints the board for the Player by mapping the items in the list to the DisplayChar function (if 2 is an item in the list, it prints X etc). So my novice knowledge tells me that the Deploy_Destroyer_1 function should be called in Player = in the Main function (included above) to ensure that the item in the list is changed, therefore the character printed should change.
我猜我的新代码 (Deploy_Destroyer_1) 有问题，没有正确执行此操作(要么不更改列表中的项目，因此不打印正确的字符，或其他我想不到的东西).
I’m guessing that there is something wrong with my new code (Deploy_Destroyer_1) which doesn’t do this correctly (either doesn’t change the item in the list therefore doesn’t print the correct character, or something else which I can’t think of).
不过我也有很大的可能把自己弄糊涂了
However there is also a big chance that I have confused myself
我只学了几周 Python，所以如果有人需要更多细节来帮助我，请询问
I have only been learning Python for a couple of weeks so if anyone needs more detail in order to help me please ask
推荐答案
如果你来到这里是因为你正在寻找TypeError: sequence item 0: expected string, NoneType found"，它可以来自于按照这些方式做某事...
If you've arrived here because you were looking for the root cause of "TypeError: sequence item 0: expected string, NoneType found", it can come from doing something along these lines...
','.join([None])
这篇关于类型错误:序列项 0:预期的字符串，找到 NoneType的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
