how to access first output from Python loop-CodePudding

I have this python loop:

for idx, device in enumerate(account.covers.values()):

so then when i do print(device.device_id)

I get this result:

chdibcb32
chdbvvo13
f82074242

because there is 3 devices, which is right. Now i want to access the first one only chdibcb32. I tried print(device.device_id[0]), but that just prints the first letter of each output.

how can i do this?

CodePudding user response：

Why bother looping?

If account.covers.values() returns a sequence, you can use indexing to get its first element:

device = account.covers.values()[0]
print(device.device_id)

If it's an iterator, you can use next():

device = next(account.covers.values())

If it's some other iterable (like a dict view or set), you can use next(iter()):

device = next(iter(account.covers.values()))

Sidenote: this solution is basically equivalent to:
```
for device in account.covers.values():
    break
```

CodePudding user response：

You don't have to loop. You can do it like this print(account.covers.values()[0].device_id) if I'm not mistaken.

CodePudding user response：

it is because you use for each loop. Each item is using string but not list. Thats why python chose the first letter instead of the item in the list