Question

TypeError：无法隐式地将'NoneType'对象转换为str。这是我尝试使用函数将条目硬编码到字典时得到的错误。让用户输入工作，并将其放入字典中，但这不起作用。我已经搜索了其他错误，比如这个（意思是TypeError。），但我什么都没想出来。发生此错误的其他两个（This和this）条目与我无关。

因此。我试图让AweInspiring和BeingAwesome成为一个打印函数，认为它可以正确地打印到Achievements字典中，因为只需将AweInspiring和BeingAwesome放在那里就会导致它说它需要定义。然后它出现了这个错误。我认为它应该有用，但它没有，我不知道为什么。有人能帮助我吗？

    achievements = {}
    AweInspiring = print()
    BeingAwesome = print()

    def dovar():
        global achievements
        print('Type in either \'achievement get\' or \'view achievements.\'')
        achieve = input()
        if achieve == 'view achievements':
            print('Achievements')
            for x in achievements.keys():
                print('Achievement Name: ' + x + '\tFor: ' + achievements[x])
        elif achieve == 'achievement get':
            achieveget()
        elif achieve == 'achieve':
            hardachieve()

    def achieveget():
        print('Add Achievement')
        achievename = input('Name of achievement earned: ')
        achievedesc = input('How was the achievement earned: ')
        achievements[achievename] = achievedesc
        dovarloop()

    def hardachieve():
        achievename = AweInspiring
        achievedesc = BeingAwesome
        achievements[achievename] = achievedesc
        dovar()

    def dovarloop():
        dovar()

    dovar()

Answer 1

print()不返回任何内容（默认情况下，它返回None）。那么当你做achievements[achievename] = achievedesc时，python实际上是这样做的：

{None:None}

然后你正在做：

print('Achievement Name: ' + x + '\tFor: ' + achievements[x])

其中x为关键None，achievements[x]为值（也为None）

但是你不能连接字符串和NoneType（因此错误）。

所以，你的代码是最简单的形式（例如），你试图这样做：

print('Hello' + None)

要解决此问题，您可以将AweInspiring和BeingAwesome设为空字符串：

AweInspiring = ''
BeingAwesome = ''

Answer 2

在我的闲置中编辑它，添加了一些成就，并最终为自己感到骄傲，因为它适用于我：

 achievements = {}

def dovar():
    global achievements
    print('Type in either \'achievement get\' or \'view achievements.\'')
    achieve = raw_input()
    if achieve == 'view achievements':
        print('Achievements')
        for x in achievements.keys():
            print('Achievement Name: ' + x + '\tFor: ' + achievements[x])
   elif achieve == 'achievement get':
       achieveget()
   elif achieve == 'achieve':
       hardachieve()

def achieveget():
    print('Add Achievement')
    achievename = raw_input('Name of achievement earned: ')
    achievedesc = raw_input('How was the achievement earned: ')
    achievements[achievename] = achievedesc
    dovarloop()

 def hardachieve():
    global achievments
    achievename = "got a cat"
    achievedesc = "found one"
    achievements[achievename] = achievedesc
    #dovar()

def dovarloop():
    dovar()

dovar()

我的谈话：

================================ RESTART ============== ==================

  >>> 
 Type in either 'achievement get' or 'view achievements.'
 achievement get
 Add Achievement
 Name of achievement earned: got a cat
 How was the achievement earned: found one
 Type in either 'achievement get' or 'view achievements.'
 view achievements
 Achievements
 Achievement Name: got a cat    For: found one
 >>> 
 >>> ================================ RESTART ================================

 >>> hardachieve()

 >>> achievements
 {'got a cat': 'found one'}

字典书写和硬编码条目

2 个答案: