class_docstr: Class to model arguments to a function evaluation.
  Objects of this class are hashable and can be used as dict keys.
  
  Arguments and keyword arguments are stored in a frozenset.
class_docstr_tok: ["Class","to","model","arguments","to","a","function","evaluation",".","Objects","of","this","class","are","hashable","and","can","be","used","as","dict","keys",".","Arguments","and","keyword","arguments","are","stored","in","a","frozenset","."]
docstr: Returns a list of argument names.
docstr_tok: ["Returns","a","list","of","argument","names","."]
code: def keys(self):
      """Returns a list of argument names."""
      return map(op.itemgetter(0), self.parameters)
  
imports: import collections
  import functools
  import threading
  import operator
label_desc: Use image node_id 8 for calling the Args obj's underlying member method code with example usage: obj.keys() and returns: map