+1, is it in your branch somewhere?
Ondrej
OnMon, May 3, 2010 at 3:32 AM, Øyvind Jensen <jensen.oyv...@gmail.com> wrote:
> Before: -1^{x}
> Now: \left(-1\right)^{x}
>
> Added a test
> ---
> sympy/printing/latex.py | 3 ++-
> sympy/printing/tests/test_latex.py | 3 +++
> 2 files changed, 5 insertions(+), 1 deletions(-)
>
> diff --git a/sympy/printing/latex.py b/sympy/printing/latex.py
> index cce22fc..b298be0 100644
> --- a/sympy/printing/latex.py
> +++ b/sympy/printing/latex.py
> @@ -83,7 +83,8 @@ def _needs_brackets(self, expr):
> printed, False otherwise. For example: a + b => True; a => False;
> 10 => False; -10 => True.
> """
> - return not ((expr.is_Integer and expr.is_nonnegative) or
> expr.is_Atom)
> + return not ((expr.is_Integer and expr.is_nonnegative)
> + or (expr.is_Atom and expr is not S.NegativeOne))
>
> def _needs_function_brackets(self, expr):
> """
> diff --git a/sympy/printing/tests/test_latex.py
> b/sympy/printing/tests/test_latex.py
> index 7afaf28..8fad7ff 100644
> --- a/sympy/printing/tests/test_latex.py
> +++ b/sympy/printing/tests/test_latex.py
> @@ -94,6 +94,9 @@ def test_latex_functions():
> assert latex(gamma(x)) == r"\operatorname{\Gamma}\left(x\right)"
> assert latex(Order(x)) == r"\operatorname{\mathcal{O}}\left(x\right)"
>
> +def test_latex_brackets():
> + assert latex((-1)**x) == r"\left(-1\right)^{x}"
> +
> def test_latex_derivatives():
> assert latex(diff(x**3, x, evaluate=False)) == \
> r"\frac{\partial}{\partial x} x^{3}"
> --
> 1.6.5
>
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