"polling exception: a bytes-like object is required, not 'str'"

[Seeelefant]

I installed sequoia-ptpy via pip, ran

from ptpy import PTPy
camera = PTPy()

and got

E 159369 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 160941 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 162515 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'

Please advice
--Seeelefant

[domenzain]

Hi,

Could you try declaring PTPY_DEBUG=1 and running again.
Please post the output here.

Best,

[Seeelefant]

Hi,
here it is:

Python 3.5.3 (v3.5.3:1880cb95a742, Jan 16 2017, 16:02:32) [MSC v.1900 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> from ptpy import PTPy
>>> PTPY_DEBUG=1
>>> camera = PTPy()
E 23178 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23179 ptpy.ptp[MainThread:recv:801] a bytes-like object is required, not 'str'
Traceback (most recent call last):
E   File "D:\Program Files\Python35\lib\site-packages\usb\core.py", line 223, in get_interface_and_endpoint
23184 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23195 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23203 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23208 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23217 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23220 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23223 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23227 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23230 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23233 ptpy.transports.usb[EvtPolling    :return self._ep_info[endpoint_address]
__poll_eventsKeyError:582] : 2
<DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
During handling of the above exception, another exception occurred:


Traceback (most recent call last):
  File "D:\Program Files\Python35\lib\site-packages\ptpy\transports\usb.py", line 397, in __send
E 23244 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23249 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23250 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23252 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23254 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23255 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23258 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23260 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23262 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23263 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23264 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23268     ep.write(transaction)
  File "D:\Program Files\Python35\lib\site-packages\usb\core.py", line 387, in write
ptpy.transports.usb[    return self.device.write(self, data, timeout)EvtPolling
:  File "D:\Program Files\Python35\lib\site-packages\usb\core.py", line 940, in write
__poll_events:582]     intf, ep = self._ctx.setup_request(self, endpoint)
<DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'  File "D:\Program Files\Python35\lib\site-packages\usb\core.py", line 102, in wrapper

    return f(self, *args, **kwargs)E
  File "D:\Program Files\Python35\lib\site-packages\usb\core.py", line 215, in setup_request
23275     intf, ep = self.get_interface_and_endpoint(device, endpoint_address)
  File "D:\Program Files\Python35\lib\site-packages\usb\core.py", line 102, in wrapper
ptpy.transports.usb    [return f(self, *args, **kwargs)
EvtPolling  File "D:\Program Files\Python35\lib\site-packages\usb\core.py", line 225, in get_interface_and_endpoint
:    for intf in self.get_active_configuration(device):__poll_events
:582]   File "D:\Program Files\Python35\lib\site-packages\usb\core.py", line 102, in wrapper
    return f(self, *args, **kwargs)<DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'

  File "D:\Program Files\Python35\lib\site-packages\usb\core.py", line 236, in get_active_configuration
E     23283self.managed_open()
  File "D:\Program Files\Python35\lib\site-packages\usb\core.py", line 102, in wrapper
ptpy.transports.usb    [return f(self, *args, **kwargs)
EvtPolling  File "D:\Program Files\Python35\lib\site-packages\usb\core.py", line 120, in managed_open
:    self.handle = self.backend.open_device(self.dev)__poll_events
:582]   File "D:\Program Files\Python35\lib\site-packages\usb\backend\libusb0.py", line 485, in open_device
<DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23295 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23297 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23300 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23302 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23305 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23308 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23309 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 23313 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
    return _check(_lib.usb_open(dev))
  File "D:\Program Files\Python35\lib\site-packages\usb\backend\libusb0.py", line 431, in _check
    raise USBError(errmsg, ret)
usb.core.USBError: [Errno None] b'libusb0-dll:err [os_open] failed to open \\\\.\\libusb0-0001--0x04a9-0x32c0: win error: Das System kann die angegebene Datei nicht finden.\r\n'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "D:\Program Files\Python35\lib\site-packages\ptpy\__init__.py", line 114, in __new__
    device_info = plain_camera.get_device_info()
  File "D:\Program Files\Python35\lib\site-packages\ptpy\ptp.py", line 953, in get_device_info
    response = self.recv(ptp)
  File "D:\Program Files\Python35\lib\site-packages\ptpy\ptp.py", line 802, in recv
    raise e
  File "D:\Program Files\Python35\lib\site-packages\ptpy\ptp.py", line 799, in recv
    return super(PTP, self).recv(ptp_container)
  File "D:\Program Files\Python35\lib\site-packages\ptpy\transports\usb.py", line 478, in recv
    self.__send_request(ptp_container)
  File "D:\Program Files\Python35\lib\site-packages\ptpy\transports\usb.py", line 425, in __send_request
    self.__send(ptp)
  File "D:\Program Files\Python35\lib\site-packages\ptpy\transports\usb.py", line 402, in __send
    ('timeout' in e.strerror or
TypeError: a bytes-like object is required, not 'str'
>>> E 24888 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 26462 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 28037 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 29613 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 31200 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 32775 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
E 34357 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'

E 35932 ptpy.transports.usb[EvtPolling:__poll_events:582] <DEVICE ID 04a9:32c0 on Bus 000 Address 001> polling exception: a bytes-like object is required, not 'str'
Exception ignored in: <module 'threading' from 'D:\\Program Files\\Python35\\lib\\threading.py'>
Traceback (most recent call last):
  File "D:\Program Files\Python35\lib\threading.py", line 1288, in _shutdown
    t.join()
  File "D:\Program Files\Python35\lib\threading.py", line 1054, in join
    self._wait_for_tstate_lock()
  File "D:\Program Files\Python35\lib\threading.py", line 1070, in _wait_for_tstate_lock
    elif lock.acquire(block, timeout):
KeyboardInterrupt

Best
--Seeelefant

[domenzain]

Hi @Seeelefant,

Sorry for the lack of response.
In order to declare environment variables from within the python environment you need to do:

import os
os.environ["PTPY_DEBUG"] = "1"

Looking at the USB IDs, it looks ilke it is a Canon Digital Ixus 180.
Sadly this camera does not implement capture, but it should indeed communicate...

[ohuu]

I'm having the same problem. I have a Canon EOS Rebel T3. Did you get to the bottom of what's causing this @domenzain @Seeelefant?

[domenzain]

Hi @PaperPlaneSoftware,

Please follow the instructions above and provide the logs.