Error while downloading captures from servers about compoundpi

[waveform80]

Can you post the code you're using?

[mananwason]

Sure. This is the code I'm running. Just basic capturing and downloading.

from compoundpi.client import CompoundPiClient
import io
client = CompoundPiClient()
try:
        client.servers.network = '192.168.43.1/24'
        #client.servers.output = '/home/manan/Desktop/captures'
        client.servers.find(10)
        client.capture()
    for addr, files in client.list().items():
         for f in files:
            print('Downloading image %d from %s (%d bytes)' % (
                f.index,
                addr,
                f.size,
                ))
            with io.open('%s-%d.jpg' % (addr, f.index)) as f:
                client.download(addr, f.index, f)
finally:
    client.clear()  
    client.close()

[waveform80]

Ah, you're missing the file mode in io.open. This defaults to 'r' (read) so you're attempting to open "192.168.43.171-0.jpg" for reading and, naturally, it doesn't exist so you wind up with a no such file or directory error. Just add a 'wb' parameter to the io.open call and you should be good to go.

[mananwason]

Oh this is solved the problem but another I got another one now. It prints the index but shows this error as well.

AttributeError: '_io.BufferedWriter' object has no attribute 'index'

This is while download using client.download(addr, f.index, f)

[waveform80]

Ah indeed - you've called the open file object f which overwrites the file metadata object f. Hence, when it goes to look for f.index within the with clause you get an attribute error. I'd suggest calling the open file object something else (have a look at the first example in http://compoundpi.readthedocs.org/en/release-0.4/batch.html#examples which uses "output" as the name instead)

[mananwason]

Oh yeah. That was the issue. Now it is working fine. But I also need the epoch time in the name of the file. How can I do that?

[waveform80]

Assuming by "epoch time" you mean "seconds since the UNIX epoch" (i.e. a UNIX timestamp), f.timestamp will contain the capture timestamp as a datetime object so you could do something like:

with io.open('%s-%d-%d.jpg' % (addr, f.index, f.timestamp.timestamp())) as output:
    client.download(addr, f.index, output)

[mananwason]

I had tried doing this earlier but what I got was
AttributeError: 'datetime.datetime' object has no attribute 'timestamp'
I googled it but didn't find any conclusive answers.

[waveform80]

Are you perhaps using Python 2? The timestamp method for datetime objects was only added in Python 3. In Python 2 you'd need to do something like:

from time import mktime

...

with io.open('%s-%d-%d.jpg' % (addr, f.index, mktime(f.timestamp.timetuple()))) as output:
    client.download(addr, f.index, output)

[mananwason]

oh yeah !! Thanks for your help!!