由GCM推送Android应用程序的通知(Push notification for android app by GCM)

 你正在用另一个影子你的for-loop i ： 
 
for i in range(1,3):
    # type(i) is int
    …
    for i in scan1:
        …
    # type(i) is str
    …
    diskchange[i] = disk # i is str() here, so it yells at you!
 
 将你的内循环索引从i更改为j ，你应该没问题。 
 
 在python中，变量的可见性超过了一个完整的函数，而不是一个块。 因此，当您在块中定义变量时，它在块之后仍然可见： 
 
 i = 'foobar'
 print(i, type(i))
 for i in range(100):
     pass
 print(i, type(i))
 
 会给： 
 
foobar str
100 int
 
 因此在重用变量名时要小心。 
 
 要解决您的问题，只需将索引名称更改为j ： 
 
for j in scan1:
    if j not in scan2:
            result = result + j
 
 
 奖金： 
 
 在下面的代码片段中，您将通过将整个内容发送到shell来读取脚本的完整内容以执行它： 
 
with open('removeslot%d.sh' %i, 'rb') as f:
    script = f.read()
subprocess.call(script, shell=True)
 
 这实际上是过度设计，你可以简单地做： 
 
subprocess.call('removeslot%d.sh' % i, shell=True)
 
 执行脚本（或'bash removeslot%d.sh' % i ，以防您的.sh不可执行）。 还要注意你再次遮蔽一个符号： file是用于处理全局可用文件的类。 改用f ！ 
 
 HTH 

You're shadowing your for-loop i with another i:
 
for i in range(1,3):
    # type(i) is int
    …
    for i in scan1:
        …
    # type(i) is str
    …
    diskchange[i] = disk # i is str() here, so it yells at you!
 
Change your inner loop's index from i to j and you should be fine.
 
In python, the variable's visibility is over a full function, not a block. So when you're defining a variable within a block, it's still visible after the block:
 
 i = 'foobar'
 print(i, type(i))
 for i in range(100):
     pass
 print(i, type(i))
 
will give:
 
foobar str
100 int
 
so be careful when reusing variable names.
 
To fix your issue, just change the index name to j:
 
for j in scan1:
    if j not in scan2:
            result = result + j
 
 
bonus:
 
In the following snippet, you're reading the full content of a script to execute it by sending its whole content to a shell:
 
with open('removeslot%d.sh' %i, 'rb') as f:
    script = f.read()
subprocess.call(script, shell=True)
 
this is actually over engineered, you can simply do:
 
subprocess.call('removeslot%d.sh' % i, shell=True)
 
to execute the script (or 'bash removeslot%d.sh' % i in case your .sh is not executable). Also beware that you're again shadowing a symbol: file is the class for handling files that is globally available. Use f instead!
 
HTH