PyUSB does not seem to be properly installed one one computer
calugaruful-dotcom opened this issue · 3 comments
I have a python script I am running in pycharm and recently I am getting this error: ValueError: PyUSB does not seem to be properly installed.
I have ran this script on this computer before, and it worked. I usually install, libusb, pyvisa, pyvisa-py, pyusb packages and that seems to take care of the backend. For example, if I copy this same script and install the same packages on a different computer, it works and I get no error.
On the non working computer when I run pyvisa-info I can also see the usb backend is not configured:
`PyVISA Version: 1.13.0
Backends:
ivi:
Version: 1.13.0 (bundled with PyVISA)
Binary library: Not found
py:
Version: 0.7.0
TCPIP INSTR: Available
Resource discovery:
- VXI-11: ok
- hislip: ok
TCPIP SOCKET: Available
ASRL INSTR:
Please install PySerial (>=3.0) to use this resource type.
No module named 'serial'
USB INSTR:
PyUSB does not seem to be properly installed.
Please refer to PyUSB documentation and
install a suitable backend like
libusb 0.1, libusb 1.0, libusbx,
libusb-win32 or OpenUSB.
No backend available
USB RAW:
PyUSB does not seem to be properly installed.
Please refer to PyUSB documentation and
install a suitable backend like
libusb 0.1, libusb 1.0, libusbx,
libusb-win32 or OpenUSB.
No backend available
VICP INSTR:
Please install PyVICP to use this resource type.
GPIB INSTR:
Please install linux-gpib (Linux) or gpib-ctypes (Windows, Linux) to use this resource type. Note that installing gpib-ctypes will give you access to a broader range of functionalities.
No module named 'gpib'
GPIB INTFC:
Please install linux-gpib (Linux) or gpib-ctypes (Windows, Linux) to use this resource type. Note that installing gpib-ctypes will give you access to a broader range of functionalities.
No module named 'gpib'`
All this message means is that usb.core.find() failed. Given that (I presume that) this is Windows (because you stripped out all system information from info output), I suspect that something is off with binary usb libraries.
Check https://github.com/pyusb/pyusb/blob/master/docs/faq.rst, especially the first two entries.
This is the error output I am getting from usb.core.find()
2023-07-13 11:23:59,582 ERROR:usb.backend.libusb1:Error loading libusb 1.0 backend
2023-07-13 11:23:59,584 ERROR:usb.libloader:'Libusb 1' could not be found
2023-07-13 11:23:59,584 ERROR:usb.backend.libusb1:Error loading libusb 1.0 backend
2023-07-13 11:23:59,584 ERROR:usb.libloader:'OpenUSB library' could not be found
2023-07-13 11:23:59,584 ERROR:usb.backend.openusb:Error loading OpenUSB backend
2023-07-13 11:23:59,585 ERROR:usb.libloader:'Libusb 0' could not be found
2023-07-13 11:23:59,585 ERROR:usb.backend.libusb0:Error loading libusb 0.1 backend
Where is usb automatically looking for the libusb files? I understood it was system32 folder, and I put the .dlls there but that didn't work.
usb is pyusb, there is no pyvisa code there. This should help you find the answer or ask the question in the relevant project (where more people might have relevant knowledge).