code: def _print_seq(self, seq, delimiter=", "):
      # simplified _print_seq taken from pretty.py
      s = [self._print(item) for item in seq]
      if s:
          return delimiter.join(s)
      else:
          return ""
  
imports: from .pycode import PythonCodePrinter, MpmathPrinter
  from .numpy import NumPyPrinter
  from sympy.core.sorting import default_sort_key
label_desc: Use image node_id 2 for calling the NumExprPrinter obj's underlying member method code with example usage: obj._print_seq(seq, delimiter) and returns: delimiter, str