class_docstr: Printer which converts a SymPy expression into a maple code.
code: def _print_Identity(self, expr):
      if isinstance(expr.rows, (Integer, IntegerConstant)):
          return self._print(sympy.SparseMatrix(expr))
      else:
          return "Matrix({var_size}, shape = identity)".format(
              var_size=self._print(expr.rows)
          )
  
imports: from sympy.core import S
  from sympy.core.numbers import Integer, IntegerConstant, equal_valued
  from sympy.printing.codeprinter import CodePrinter
  from sympy.printing.precedence import precedence, PRECEDENCE
  import sympy
label_desc: Use image node_id 25 for calling the MapleCodePrinter obj's underlying member method code with example usage: obj._print_Identity(expr) and returns: self, str