TypeError: Objects for SAFEARRAYS must be sequences (of sequences), or a buffer object.

[josepegerent]

ENVIRONMENT

• Operating System: Windows 7 64bits
• Python version: Python 2.7.13 64bits
• VirtualBox version: 5.1.22 r115126 (Qt5.6.2)
• VirtualBox SDK version: vboxapi.py 109501 2016-08-03 09:51:47Z
• pyvbox version: 1.0.0

SUMMARY

I am trying to set the network adapter type to virtualbox.library.NetworkAdapterType.i82540_em but I'm getting some error.

STEPS TO REPRODUCE

network_adapter = vm.get_network_adapter(0) # 0 - first adapter network_adapter.adapter_type = virtualbox.library.NetworkAdapterType.i82540_em

EXPECTED RESULTS

I expect to set the network adapter type to virtualbox.library.NetworkAdapterType.i82540_em

ACTUAL RESULTS

network_adapter.adapter_type = virtualbox.library.NetworkAdapterType.i82540_em File "C:\Python27\lib\site-packages\virtualbox\library.py", line 22755, in adapter_type return self._set_attr("adapterType", value) File "C:\Python27\lib\site-packages\virtualbox\library_base.py", line 166, in _set_attr return setattr(self._i, name, value) File "C:\Python27\lib\site-packages\vboxapi__init__.py", line 193, in _CustomSetAttr return _g_dCOMForward['setattr'](self, ComifyName(sAttr), oValue) File "C:\Python27\lib\site-packages\win32com\client__init.py", line 474, in setattr__ self.oleobj.Invoke(*(args + (value,) + defArgs)) TypeError: Objects for SAFEARRAYS must be sequences (of sequences), or a buffer object. Win32 exception occurred releasing IUnknown at 0x005ea9c8 Win32 exception occurred releasing IUnknown at 0x0062eb28 Win32 exception occurred releasing IUnknown at 0x0062ec08

[sethmlarson]

Thanks for this report! I will look into this later tonight.

[sethmlarson]

Was the machine running or not running? Was the machine a part of a session (ie session.machine) or was it directly from VirtualBox.find_machine()? Are you building a machine configuration from scratch or is this virtual machine already configured via the GUI?

[sethmlarson]

So I can reproduce this on Windows 10, Python 3.5.2. Definitely seems like a bug!

[sethmlarson]

I'm really confused why virtualbox isn't converting the enum into an integer as it does for all other types.

[josepegerent]

Just to answer your question, I'm creating the machine, it is not running yet. I have the same code running on Linux, but now I need this to run on windows as well.

vbox = virtualbox.VirtualBox() vm_hd_name = "HD" vm_hd_path = os.getcwd() + '/' + vm_hd_name + ".vdi" #set a path for the VM's HD's vm = vbox.create_machine("", vm_name, [], "", "forceOverwrite=1") # Create the VM bus = virtualbox.library.StorageBus(2) # 2 is a enum type and refers to SATA vm.add_storage_controller("SATA", bus) vm.set_boot_order(4, virtualbox.library.DeviceType.network) network_adapter = vm.get_network_adapter(0) # 0 - first adapter network_adapter.adapter_type = virtualbox.library.NetworkAdapterType.i82540_em network_adapter.enabled = True network_adapter.attachment_type = virtualbox.library.NetworkAttachmentType.internal network_adapter.internal_network = "node" network_adapter.cable_connected = True network_adapter.promisc_mode_policy = virtualbox.library.NetworkAdapterPromiscModePolicy.allow_all vm.save_settings() # save VM files vbox.register_machine(vm) # register the VM at VirtualBox (import)

I'm glad to hear you found a solution! I appreciate your attention, when you have the fix ready just update the thread and I will update our API.

Thank you.

[sethmlarson]

I'm glad you said that it works on Linux, this means that it's something going wrong in the win32com module.

[josepegerent]

Is there a workaround I can do to bypass this error?

[sethmlarson]

I'm not aware of one, I haven't found anything that works yet.

[mjdorma]

It does seem similar to an issue encountered a few years ago: https://github.com/mjdorma/pyvbox/issues/8#issuecomment-35508079

If a workaround is found, a solution could be added to library_ext to extend the NetworkAdapter interface.

[mjdorma]

Oh, to clarify, similar (same) COM error, but different interface so different issue ;).

[sethmlarson]

Aha! I'm actually kind of surprised that this wasn't noticed earlier. It seems like any attribute which doesn't have a setXYZ() method doesn't get the Enum converted to an integer type before being passed to the COM interface. I'll open up a PR on this soon!

[sethmlarson]

I've merged the fix, there should be a new release hopefully by the end of today or tomorrow. :)