尝试将“ if”更改为“ elif”时出现错误。当我使用if时，代码可以完美地工作，但是如果我尝试使用“ elif”，则会引发语法错误。我需要使用“ elif”，因为我只希望其中一个if语句运行，而不是两个都运行。这段代码可以正常工作：
guess_row=0
guess_col=0
ship_location=0
number_of_attempts=3
guess_location = input("Guess :").split(",")
guess_row,guess_col = int(guess_location[0]),int(guess_location[1])
if guess_row not in range(1,6):
print("Out of range1.")
print(guess_location)
print(ship_location)
if guess_col not in range(1,6):
print("Out of range2.")
print(guess_location)
print(ship_location)
if ship_location == guess_location:
print("You sunk my battleship! You win!")
else:
print ("You missed!")
print ("You have " + str(number_of_attempts-1) + " attempt(s) left!")
print ("Try again!")
number_of_attempts-=1
但是，如果我将第二个或第三个“ if”更改为“ elif”：
guess_row=0
guess_col=0
ship_location=0
number_of_attempts=3
guess_location = input("Guess :").split(",")
guess_row,guess_col = int(guess_location[0]),int(guess_location[1])
if guess_row not in range(1,6):
print("Out of range1.")
print(guess_location)
print(ship_location)
elif guess_col not in range(1,6):
print("Out of range2.")
print(guess_location)
print(ship_location)
elif ship_location == guess_location:
print("You sunk my battleship! You win!")
else:
print ("You missed!")
print ("You have " + str(number_of_attempts-1) + " attempt(s) left!")
print ("Try again!")
number_of_attempts-=1
我收到语法错误。帮助？
elif不是单独的声明。elif是现有if语句的选项部分。
因此，您只能在一个块之后elif 直接使用if：
if sometest:
indented lines
forming a block
elif anothertest:
another block
在你的代码，但是，elif并没有直接跟随一个块中有一部分if发言。您之间的线不再是块的一部分，因为它们不再缩进if块级别了：
if guess_row not in range(1,6):
print("Out of range1.") # part of the block
print(guess_location) # NOT part of the block, so the block ended
print(ship_location)
elif guess_col not in range(1,6):
分开 if语句无关紧要；未缩进的print()语句在if块之间执行。
你将需要转移这些print()要运行的功能后的if...elif...elsestatemement：
if guess_row not in range(1,6):
print("Out of range1.")
elif guess_col not in range(1,6):
print("Out of range2.")
elif ship_location == guess_location:
print("You sunk my battleship! You win!")
else:
print ("You missed!")
print ("You have " + str(number_of_attempts-1) + " attempt(s) left!")
print ("Try again!")
number_of_attempts-=1
print(guess_location)
print(ship_location)
或将其缩进固定为if和elif块的一部分。
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