Python 列表帮助：TypeError：无法连接 'str' 和 'list' 对象答案

【问题标题】：Python List help: TypeError: cannot concatenate 'str' and 'list' objectsPython 列表帮助：TypeError：无法连接 'str' 和 'list' 对象
【发布时间】：2014-05-02 20:21:39
【问题描述】：

我正在为主桌面制作一个列表，以读取哪些图标是可执行的，哪些不是。我不断收到错误： TypeError: 无法连接 'str' 和 'list' 对象

以下是代码示例：是的，我已经尝试了一切，但它就是不想工作。

    list0 = ["","","","","","","","","","","","","","","","","","","","","","","","","","","","","","","",""]
    for filee in fls:
        if filee.endswith(".jex"):
            jkjk = filee
            icon = os.listdir("/Users/"+getpass.getuser()+"/Desktop/"+jkjk+"/Files/Icon")
            for anything in icon:
                if anything.endswith(".png"):
                    fttts = pygame.image.load("/Users/"+getpass.getuser()+"/Desktop/"+jkjk+"/Files/Icon/"+anything)
                    fttts = pygame.transform.scale(fttts, (48, 48))
                    screen.blit(fttts, (15+aaas, 295+fasdd))
                    print("aaas = "+str(aaas))
                    print("fasdd = "+str(fasdd))
                    fasdd = fasdd + 45

                    if fasdd >= winy-295-63:
                        aaas = aaas + 63
                        fasdd = -280
            jkjk = jkjk+"/Files/Executable"
            jkjk = os.listdir("/Users/"+getpass.getuser()+"/Desktop/"+jkjk)
            for exfilepy in jkjk:
                if exfilepy.endswith(".py"):
                    for o in os.listdir("/Users/"+getpass.getuser()+"/Desktop/"+jkjk+execfilepy):
                        ftttThis[o] = [str(os.listdir("/Users/"+getpass.getuser()+"/Desktop/"+jkjk+execfilepy)[o])]
                    for i in list0:
                        list0[i] = ftttThis[i]

.jex 是自定义扩展名，不会导致问题。这是列表。

输出：

Traceback (most recent call last):
  File "/Users/kf9z/Desktop/JupeeGUIFiles 2/JUPEE_GUI_WINDOWS copy.py", line 750, in <module>
    top().top()
  File "/Users/kf9z/Desktop/JupeeGUIFiles 2/JUPEE_GUI_WINDOWS copy.py", line 418, in top
    lock().locked()
  File "/Users/kf9z/Desktop/JupeeGUIFiles 2/JUPEE_GUI_WINDOWS copy.py", line 338, in locked
    lock().unlocked()
  File "/Users/kf9z/Desktop/JupeeGUIFiles 2/JUPEE_GUI_WINDOWS copy.py", line 410, in unlocked
    setup().setdesk()
  File "/Users/kf9z/Desktop/JupeeGUIFiles 2/JUPEE_GUI_WINDOWS copy.py", line 191, in setdesk
    for o in os.listdir("/Users/"+getpass.getuser()+"/Desktop/"+jkjk+execfilepy):
TypeError: cannot concatenate 'str' and 'list' objects

这是 Python 2.7（或 2.x）

【问题讨论】：

它实际上并没有告诉哪些是可执行的，哪些是不可执行的，它是在告诉它
不是创建一个空字符串列表，而是创建一个 empty 列表并使用lis0.append() 添加新元素..
它告诉它：不管桌面上有多少额外的图标：转到 list0[] 找到图标指向的目录。
变量名是怎么回事？ jkjk? aaas? fasdd? fttts?

标签： python

【解决方案1】：

您将jkjk 更改为此处的列表：

jkjk = os.listdir("/Users/"+getpass.getuser()+"/Desktop/"+jkjk)

然后你试图将它连接到一个字符串：

os.listdir("/Users/"+getpass.getuser()+"/Desktop/"+jkjk+execfilepy):

如果您想要原始的jkjk，则将列表分配给一些新变量：

jkjk = jkjk+"/Files/Executable"
lis = os.listdir("/Users/"+getpass.getuser()+"/Desktop/"+jkjk) 
for exfilepy in lis:
     #your code

【讨论】：