(ctx, x, n=6, **kwargs)
return str(x)
Convert an ``mpf`` or ``mpc`` to a decimal string literal with *n*
        significant digits. The small default value for *n* is chosen to
        make this function useful for printing collections of numbers
        (lists, matrices, etc).

        If *x* is a list or tuple, :func:`~mpmath.nstr` is applied recursively
        to each element. For unrecognized classes, :func:`~mpmath.nstr`
        simply returns ``str(x)``.

        The companion function :func:`~mpmath.nprint` prints the result
        instead of returning it.

            >>> from sympy.mpmath import *
            >>> nstr([+pi, ldexp(1,-500)])
            '[3.14159, 3.05494e-151]'
            >>> nprint([+pi, ldexp(1,-500)])
            [3.14159, 3.05494e-151]
Convert an ``mpf`` or ``mpc`` to a decimal string literal with *n*
        significant digits. The small default value for *n* is chosen to
        make this function useful for printing collections of numbers
        (lists, matrices, etc).
Convert an mpf or mpc to a decimal string literal with * n * significant digits . The small default value for * n * is chosen to make this function useful for printing collections of numbers ( lists matrices etc ) .
def nstr(ctx, x, n=6, **kwargs):
        """
        Convert an ``mpf`` or ``mpc`` to a decimal string literal with *n*
        significant digits. The small default value for *n* is chosen to
        make this function useful for printing collections of numbers
        (lists, matrices, etc).

        If *x* is a list or tuple, :func:`~mpmath.nstr` is applied recursively
        to each element. For unrecognized classes, :func:`~mpmath.nstr`
        simply returns ``str(x)``.

        The companion function :func:`~mpmath.nprint` prints the result
        instead of returning it.

            >>> from sympy.mpmath import *
            >>> nstr([+pi, ldexp(1,-500)])
            '[3.14159, 3.05494e-151]'
            >>> nprint([+pi, ldexp(1,-500)])
            [3.14159, 3.05494e-151]
        """
        if isinstance(x, list):
            return "[%s]" % (", ".join(ctx.nstr(c, n, **kwargs) for c in x))
        if isinstance(x, tuple):
            return "(%s)" % (", ".join(ctx.nstr(c, n, **kwargs) for c in x))
        if hasattr(x, '_mpf_'):
            return to_str(x._mpf_, n, **kwargs)
        if hasattr(x, '_mpc_'):
            return "(" + mpc_to_str(x._mpc_, n, **kwargs)  + ")"
        if isinstance(x, basestring):
            return repr(x)
        if isinstance(x, ctx.matrix):
            return x.__nstr__(n, **kwargs)
        return str(x)
def nstr ( ctx , x , n = 6 , * * kwargs ) : if isinstance ( x , list ) : return "[%s]" % ( ", " . join ( ctx . nstr ( c , n , * * kwargs ) for c in x ) ) if isinstance ( x , tuple ) : return "(%s)" % ( ", " . join ( ctx . nstr ( c , n , * * kwargs ) for c in x ) ) if hasattr ( x , '_mpf_' ) : return to_str ( x . _mpf_ , n , * * kwargs ) if hasattr ( x , '_mpc_' ) : return "(" + mpc_to_str ( x . _mpc_ , n , * * kwargs ) + ")" if isinstance ( x , basestring ) : return repr ( x ) if isinstance ( x , ctx . matrix ) : return x . __nstr__ ( n , * * kwargs ) return str ( x )