class_docstr: Represents the vector differential operator, usually represented in
  mathematical expressions as the 'nabla' symbol.
code: def _sympystr(self, printer):
      return self._name
  
file_path: sympy/sympy/vector/deloperator.py
imports: from sympy.core import Basic
  from sympy.vector.operators import gradient, divergence, curl
label_desc: Use image node_id 5 for calling the Del obj's underlying member method code with example usage: obj._sympystr(printer) and returns: self