class_docstr: Base Class for series
docstr: This method returns the symbols in the object, excluding those
  that take on a specific value (i.e. the dummy symbols).
docstr_tok: ["This","method","returns","the","symbols","in","the","object",",","excluding","those","that","take","on","a","specific","value","(","i.e",".","the","dummy","symbols",")","."]
code: def free_symbols(self):
      """
      This method returns the symbols in the object, excluding those
      that take on a specific value (i.e. the dummy symbols).
      """
      return {j for i in self.args for j in i.free_symbols}.difference(
          self.variables
      )
  
file_path: sympy/sympy/series/series_class.py
imports: from sympy.core.expr import Expr
  from sympy.core.singleton import S
  from sympy.core.cache import cacheit
label_desc: Use image node_id 6 for calling the SeriesBase obj's underlying member method code with example usage: obj.free_symbols() and returns: unknown