Question

这可能是一个非常明显的问题，但是我刚开始使用Python，并且在这段代码中收到了与第二条elif语句有关的语法错误：

    if userInput == 'sleep':
        print('Goodnight... zzzzz')
        day += 1
        time = 'day'
        print('Goodmorning!')
    elif userInput == 'eat':
        if 'bread' in inventory:
            print('You have eaten 1x bread from your inventory. This has'
            ' restored your hunger by 5, and your health by 5. Your'
            ' hunger is now {}, and your health is {}.'.format(playerHunger + 5, playerHealth + 5)
    elif userInput == 'pick up':
        pickUpInput = input('What would you like to pick up?')
    if room == 1:
        if pickUpInput in r1Contents:
            print('1x {} added to inventory.'.format(pickUpInput))
            r1Contents.remove(pickUpInput)
            inventory.append(pickUpInput)

错误是

  File "foo.py", line 11
    elif userInput == 'pick up':
       ^
SyntaxError: invalid syntax

很抱歉，它很长，但解释我的问题的时间越短越好。我已经多次检查缩进，然后再次缩进和缩进，所以我可以肯定不是那样，但是如果我犯了一个愚蠢的错误，那就对不起！

非常感谢您！

Answer 1

将这些行更改为相同的缩进级别：

    elif userInput == 'pick up':
        pickUpInput = input('What would you like to pick up?')
        if room == 1:
            if pickUpInput in r1Contents:
                print('1x {} added to inventory.'.format(pickUpInput))
                r1Contents.remove(pickUpInput)
                inventory.append(pickUpInput)

此外，请勿在此处使用增量（+=），因为它们将返回None而不是值。首先增加值，然后将它们用作变量。增量代码不正确，请将=+更改为+=。

playerHunger += 5
playerHealth += 5
...
' hunger is now {}, and your health is {}.'.format(playerHunger, playerHealth)

Answer 2

问题是elif上方行中的打印缺少其右括号。更改为

print('You have eaten 1x bread from your inventory. This has'
        ' restored your hunger by 5, and your health by 5. Your'
        ' hunger is now {}, and your health is {}.'.format(playerHunger =+ 5, playerHealth =+ 5))

如果您尝试防止代码偏离右侧，这种事情可能更容易发现

print('You have eaten 1x bread from your inventory. This has'
        ' restored your hunger by 5, and your health by 5. Your'
        ' hunger is now {}, and your health is {}.'.format(
    playerHunger =+ 5, playerHealth =+ 5))

或者如果您将字符串放在单独的变量中

msg = ('You have eaten 1x bread from your inventory. This has'
       ' restored your hunger by 5, and your health by 5. Your'
       ' hunger is now {}, and your health is {}.')
print(msg.format(playerHunger =+ 5, playerHealth =+ 5))

尝试运行Elif时出现错误“无效语法”

2 个答案: