def find_spaces(string_to_check):
  """Returns a list of string indexes for each string this finds.
  
  Args:
    string_to_check; string: The string to scan.

  Returns:
    A list of string indexes.
  """
  spaces = list()
  for index, character in enumerate(string_to_check):
    if character == ' ':
      spaces.append(index)
  return spaces