Getting an input from the user then searching it in a folder in Python

Question

I was working on a Python project which would help my dad organize his job better. I want to get an input from the user,then searching it in the folder which is in same folder my Python file is.Like,for example, a pseudo-code

searchfile = get_input
search(searchfile)
if is_in_the_same_folder{
    print searchfile
}
else{
   print "This file cannot be found"
}

Thank you.