Hello Vishal, I believe that Python Prompt in which you tried to run the command
import torchvision is NOT inside the conda environment.
You see if it was inside the conda environment it was supposed to look in /home/iseadmin/anaconda3/envs/dl1/lib/python3.6/site-packages/torchvision
So run the following commands in a sequence and let me know the result:
conda activate dl1
python3 and then try to import
Let me know if it works or not.