Judging by your question you might not have the file in a good location; also you are not providing a path to those locations. So lets break it down a little.
You said you placed the image in the Python35 folder. Without knowing more I would imagine you are talking about the python default directory located somewhere like C:\program files\Python35.
If this is the case then change the line:
im=Image.open("haridwar.jpg")
To this:
im=Image.open("C:\program files\Python35\haridwar.jpg")
though this is not a good place for your image. We will get to that in a sec.
As you stated you also tried your desktop. So you would want to provide a path to your desktop.
Something like this:
im=Image.open("C:/Users/your_user_folder/Desktop/haridwar.jpg")
This is also not a great place for your file.
Lets try something else. Lets put the file inside your working python directory.
For example if your main.py file is located inside of
"C:/myworkspace/my_program/main.py"
then you can place that image in the same my_program folder and your code should work as is.
If you want to have a folder just for images you could have one in a directory that looks like this:
"C:/myworkspace/my_program/my_images/haridwar.jpg"
In this case you can provide a short path like this:
im=Image.open("./my_images/haridwar.jpg")
notice the . before the /my_image folder. This is used to tell Python it can look inside its current working directory for the folder.