TensorRT5.0 install error on centos 7

Hi
i 'm having trouble in installing tensorrt5.0 in centos7
i use python virtual environment

I tried to install it several times in the following way.

1.
download tar file

2.

tar xzvf TensorRT-5.0.2.6.Red-Hat.x86_64-gnu.cuda-10.0.cudnn7.3.tar.gz

3.

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/msl/opt/TensorRT-5.0.2.6/lib

4.

sudo pip3 install tensorrt-5.0.2.6-py2.py3-none-any.whl

Requirement already satisfied: numpy in /usr/lib64/python3.6/site-packages (from tensorrt==5.0.2.6) (1.15.4)
Installing collected packages: tensorrt
Successfully installed tensorrt-5.0.2.6

5.

sudo pip3 install uff-0.5.5-py2.py3-none-any.whl

Requirement already satisfied: uff==0.5.5 from file:///home/msl/opt/TensorRT-5.0.2.6/uff/uff-0.5.5-py2.py3-none-any.whl in /usr/lib/python3.6/site-packages (0.5.5)
Requirement already satisfied: protobuf>=3.3.0 in /usr/lib64/python3.6/site-packages (from uff==0.5.5) (3.7.0)
Requirement already satisfied: numpy>=1.11.0 in /usr/lib64/python3.6/site-packages (from uff==0.5.5) (1.15.4)
Requirement already satisfied: setuptools in /usr/lib/python3.6/site-packages (from protobuf>=3.3.0->uff==0.5.5) (39.0.1)
Requirement already satisfied: six>=1.9 in /usr/lib/python3.6/site-packages (from protobuf>=3.3.0->uff==0.5.5) (1.12.0)

6.

sudo pip3 install graphsurgeon-0.3.2-py2.py3-none-any.whl

Requirement already satisfied: graphsurgeon==0.3.2 from file:///home/msl/opt/TensorRT-5.0.2.6/graphsurgeon/graphsurgeon-0.3.2-py2.py3-none-any.whl in /usr/lib/python3.6/site-packages (0.3.2)

but when i’m import tensorrt like import tensorrt as trt,
i got an error "ImportError: No module named 'tensorrt

python : 3.5
cudnn 7.5
cuda 10.0
centos 7

I tried several times and I do not know what’s wrong