code: def group_by(ls: Sequence, key_func) -> dict:
      """Group elements by the result of the function applied to each element.
  
      Args:
          ls (Sequence): elements to group.
          key_func: function to apply.
  
      Returns:
          Dict grouping elements (values) by the result of the function applied to the element (keys).
  
      Examples:
          group_by([1, 2, 3, 4, 5], lambda x: x%2==0)
          # Output: {False: [1, 3, 5], True: [2, 4]}
  
      """
      result = {}
      for elem in ls:
          key = key_func(elem)
          if key not in result:
              result[key] = []
          result[key].append(elem)
      return result
  
imports: import math
  import itertools
  from dataclasses import replace
  from typing import Mapping, Any, Sequence, Iterable, Iterator, Union, Tuple, Dict, Set
label_desc: Use image node_id 4 for calling a global function with example usage: group_by(ls, key_func) and returns: result