input: Write a function to analyze the given Python function and detect any potential errors. If errors are found, modify the function to resolve them and return the corrected version. If no errors are detected, return the original function unchanged.
  assert expand_list(def expand_list(list):
      for item in list:
          list *= 2)==def expand_list(list):
      list_copy = list[:]
      for item in list_copy:
          list *= 2
output: def expand_list(list):
      list_copy = list[:]
      for item in list_copy:
          list *= 2