code: def _print_MatrixBase(self, expr):
      # special case for some empty matrices
      if (expr.rows == 0) ^ (expr.cols == 0):
          return "%s(%s, %s, %s)" % (
              expr.__class__.__name__,
              self._print(expr.rows),
              self._print(expr.cols),
              self._print([]),
          )
      l = []
      for i in range(expr.rows):
          l.append([])
          for j in range(expr.cols):
              l[-1].append(expr[i, j])
      return "%s(%s)" % (expr.__class__.__name__, self._print(l))
  
imports: from __future__ import annotations
  from typing import Any
  from sympy.core.function import AppliedUndef
  from sympy.core.mul import Mul
  from mpmath.libmp import repr_dps, to_str
  from .printer import Printer, print_function
label_desc: Use image node_id 26 for calling the ReprPrinter obj's underlying member method code with example usage: obj._print_MatrixBase(expr) and returns: unknown, unknown