3111.sagews

A = Matrix([[1,2,3],[4,5,6],[7,8,9]]); A

[1 2 3] [4 5 6] [7 8 9]

class foo:
    def __init__(self,name,something):
        self._something=something
        self._name=name
    def _latex_(self):
        return "%s = " % self._name + self._something._latex_()
    def __repr__(self):
        return self._name + str(self._something)

foo("A",A)

\newcommand{\Bold}[1]{\mathbf{#1}}A = \left($$\begin{array}{rrr} 1 & 2 & 3 \\ 4 & 5 & 6 \\ 7 & 8 & 9 \end{array}$$\right)

class Show:
    def __init__(self,*args):
        self._args=args[:]
    def _latex_(self):
        return "".join((o._latex_() if hasattr(o,"_latex_") else o) for o in self._args)
    def __repr__(self):
        return "".join((str(o) if hasattr(o,"_latex_") else o) for o in self._args)

Show("A=", A)

\newcommand{\Bold}[1]{\mathbf{#1}}A=\left($$\begin{array}{rrr} 1 & 2 & 3 \\ 4 & 5 & 6 \\ 7 & 8 & 9 \end{array}$$\right)

Show("A=",A," \mapsto ","B= ?")

\newcommand{\Bold}[1]{\mathbf{#1}}A=\left($$\begin{array}{rrr} 1 & 2 & 3 \\ 4 & 5 & 6 \\ 7 & 8 & 9 \end{array}$$\right) \mapsto B= ?