Python not working in jetson nano

brunelautonomousracing@brunelautonomousracing-desktop:~/yolov7-gpu$ python3 --weights runs/train/yolov7-cones/weights/ --source 1
Traceback (most recent call last):
File “”, line 6, in
import torch
File “/home/brunelautonomousracing/.local/lib/python3.6/site-packages/torch/”, line 195, in
File “/home/brunelautonomousracing/.local/lib/python3.6/site-packages/torch/”, line 148, in _load_global_deps
ctypes.CDLL(lib_path, mode=ctypes.RTLD_GLOBAL)
File “/usr/lib/python3.6/ctypes/”, line 348, in init
self._handle = _dlopen(self._name, mode)
OSError: cannot open shared object file: No such file or directory

how to solve it?

Hi @naikrohanp97, which version of JetPack-L4T are you running (you can check this with cat /etc/nv_tegra_release) and which PyTorch wheel did you install? You would need to install a PyTorch wheel from here which is compatible with your version of JetPack.

Also, can you check that you have CUDA Toolkit installed?

ls /usr/local/cuda/lib64/             libcufft_static.a             libcurand_static.a            libcufft_static_nocallback.a     libnvgraph_static.a                  libnppial_static.a        libnppif_static.a        libnppisu_static.a
libcublasLt_static.a                            libcusolver_static.a              libcufftw_static.a                      libnppicc_static.a        libnppig_static.a        libnppitc_static.a
libcudadevrt.a           libcusparse_static.a                  libculibos.a                  liblapack_static.a                   libmetis_static.a          libnppicom_static.a       libnppim_static.a        libnpps_static.a                    
libcudart_static.a                    stubs                  libnppc_static.a           libnppidei_static.a       libnppist_static.a             

brunelautonomousracing@brunelautonomousracing-desktop:~$ cat /etc/nv_tegra_release

R32 (release), REVISION: 6.1, GCID: 27863751, BOARD: t210ref, EABI: aarch64, DATE: Mon Jul 26 19:20:30 UTC 2021

Hi dusty,

Package: nvidia-jetpack
Version: 4.6-b199
Priority: standard
Section: metapackages
Maintainer: NVIDIA Corporation
Installed-Size: 199 kB

this is the version of jetpack installed

hi dusty, I installed same Pytorch wheel compatible with the version of jetpack but when i check CUDA installation through this line:
ls /usr/local/cuda/lib64/

it gives:
brunelautonomousracing@brunelautonomousracing-desktop:~$ ls /usr/local/cuda/lib64/
ls: cannot access ‘/usr/local/cuda/lib64/’: No such file or directory


OK, yea it looks like you need to install the CUDA Toolkit (and probably cuDNN) - can you try running this?

sudo apt-get install cuda-toolkit-10-2 libcudnn8-dev

After flash we tried to jetson nano and this is the result

Typically the Ubuntu GUI would appear at this point and allow you to proceed with the initial system setup (like creating your username/password, setting the keyboard locale, ect). If you’re having problems with that, you can also do this initial config headlessly without using a display, by using the micro-USB port instead - see here for more info:

If you encounter further issues with this, I would recommend opening a new topic about it - thanks, and good luck!

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