old_contents: """
  Elixir-related Ultisnips snippet helper functions.
  NOTE: Changes to this file require restarting Vim!
  """
  import re
  
  _DASHES_AND_UNDERSCORES = re.compile("[-_]")
  _MODULE_FILEPATH = re.compile(r"lib\/([^\/]+)\/([\w+\/]+)*\/([^\/]+).ex")
  
  def closing_character(tabstop):
      """
      Return closing character for a tabstop containing an opening character.
      """
      if tabstop.startswith("("):
          return ")"
      if tabstop.startswith("{"):
          return "}"
      if tabstop.startswith("["):
          return "]"
      if tabstop.startswith("\""):
          return "\""
  
      return ""
  
  def module_path_match(path, regex=_MODULE_FILEPATH):
      """
      Return match data for an Elixir module from a file path.
      """
      return re.search(regex, path)
  
  def outer_module_name(path):
      """
      Return name for an outer Elixir module from a file path.
      """
      outer_module_path = module_path_match(path).group(1)
      return to_module_name(outer_module_path)
  
  def to_module_name(string):
      """
      Convert string into an Elixir module name
      """
      return (
          re.sub(_DASHES_AND_UNDERSCORES, " ", string)
          .title()
          .replace(" ", "")
          .replace(".ex", "")
      )
  
new_contents: """
  Elixir-related Ultisnips snippet helper functions.
  NOTE: Changes to this file require restarting Vim!
  """
  import re
  
  _DASHES_AND_UNDERSCORES = re.compile("[-_]")
  _MODULE_FILEPATH = re.compile(r"lib\/([^\/]+)\/([\w+\/]+)*\/([^\/]+).ex")
  _CLOSING_CHARACTERS = {
      "(": ")",
      "{": "}",
      "[": "]",
      "\"": "\""
  }
  
  def closing_character(tabstop):
      """
      Return closing character for a tabstop containing an opening character.
      """
      if tabstop:
          return _CLOSING_CHARACTERS.get(tabstop[0], "")
      return ""
  
  def module_path_match(path, regex=_MODULE_FILEPATH):
      """
      Return match data for an Elixir module from a file path.
      """
      return re.search(regex, path)
  
  def outer_module_name(path):
      """
      Return name for an outer Elixir module from a file path.
      """
      outer_module_path = module_path_match(path).group(1)
      return to_module_name(outer_module_path)
  
  def to_module_name(string):
      """
      Convert string into an Elixir module name
      """
      return (
          re.sub(_DASHES_AND_UNDERSCORES, " ", string)
          .title()
          .replace(" ", "")
          .replace(".ex", "")
      )
  
subject: Refactor python if statement into dictionary