print LaTeX in notebook from script

edit

I've read through

www.sagemath.org/doc/tutorial/latex.html

but still can't seem to find the equivalent to using "view" or "pretty-print" to display equations at LaTeX in a notebook cell when running a Python script from the notebook. (I do have "Typeset" checked at the start of the notebook.) For example, suppose my file foo.py has a function:

def show_all(self):
  y = var('y')
  x = 2.0*y**2
  view(x)
  pretty_print(x)
  show(x)
  JSMath()(x)
  JSMath().eval(x)
  print JSMath()(x)
  print JSMath().eval(x)
  html(JSMath()(x))
  html(JSMath().eval(x))
  print html(JSMath()(x))
  print html(JSMath().eval(x))

Running this function from a notebook cell returns lines of the form either

  \newcommand{\Bold}[1]{\mathbf{#1}}2.0 \, y^{2}

or

  \newcommand{\Bold}[1]{\mathbf{#1}}2.0 \, y^{2}
  </font></html>

But I just want a nice LaTeX display of 2y**2 equivalent to typing (from a notebook cell)

view(2.0*y**2)

which returns

2.00000000000000y2 (prettier than this of course)

So I'm still missing the right combination of LaTeX library functions. As a follow-up question, is dealing with LaTeX macros the only way to get the "2.00000000000" in the above to display as 2.0, 2.00, etc.?