def unescapeEndpointDescription(desc):
    result = []
    escape = []
    depth = 0
    desc = iter(desc)
    for char in desc:
        if char == "\\":
            try:
                char = desc.next()
            except StopIteration:
                raise ValueError ("Endpoint description not valid: escaped end of string")
            if char not in "{}":
                char = "\\{}".format(char)
            if depth == 0:
                result.extend(char)
            else:
                escape.extend(char)
        elif char == "{":
            if depth > 0:
                escape.append("{")
            depth += 1
        elif char == "}":
            depth -= 1
            if depth < 0:
                raise ValueError ("Endpoint description not valid: mismatched end brace")
            if depth == 0:
                result.extend(unescapeEndpointDescription("".join(escape)).replace("\\", "\\\\").replace(":", "\\:").replace("=", "\\="))
            else:
                escape.append("}")
        else:
            if depth == 0:
                result.append(char)
            else:
                escape.append(char)
    if depth != 0:
        raise ValueError ("Endpoint description not valid: mismatched opening brace")
    return "".join(result)
def _enum(**enums):
    return type('Enum', (), enums)

ModeType = _enum(List=0, ParamOnUnset=1, Param=2, NoParam=3, Status=4)

def unescapeEndpointDescription(desc):
    result = []
    escape = []
    depth = 0
    desc = iter(desc)
    for char in desc:
        if char == "\\":
            try:
                char = desc.next()
            except StopIteration:
                raise ValueError ("Endpoint description not valid: escaped end of string")
            if char not in "{}":
                char = "\\{}".format(char)
            if depth == 0:
                result.extend(char)
            else:
                escape.extend(char)
        elif char == "{":
            if depth > 0:
                escape.append("{")
            depth += 1
        elif char == "}":
            depth -= 1
            if depth < 0:
                raise ValueError ("Endpoint description not valid: mismatched end brace")
            if depth == 0:
                result.extend(unescapeEndpointDescription("".join(escape)).replace("\\", "\\\\").replace(":", "\\:").replace("=", "\\="))
            else:
                escape.append("}")
        else:
            if depth == 0:
                result.append(char)
            else:
                escape.append(char)
    if depth != 0:
        raise ValueError ("Endpoint description not valid: mismatched opening brace")
    return "".join(result)
Add a ModeType enum for later benefit
Add a ModeType enum for later benefit

+ def _enum(**enums):
+     return type('Enum', (), enums)
+ 
+ ModeType = _enum(List=0, ParamOnUnset=1, Param=2, NoParam=3, Status=4)
+ 
  def unescapeEndpointDescription(desc):
      result = []
      escape = []
      depth = 0
      desc = iter(desc)
      for char in desc:
          if char == "\\":
              try:
                  char = desc.next()
              except StopIteration:
                  raise ValueError ("Endpoint description not valid: escaped end of string")
              if char not in "{}":
                  char = "\\{}".format(char)
              if depth == 0:
                  result.extend(char)
              else:
                  escape.extend(char)
          elif char == "{":
              if depth > 0:
                  escape.append("{")
              depth += 1
          elif char == "}":
              depth -= 1
              if depth < 0:
                  raise ValueError ("Endpoint description not valid: mismatched end brace")
              if depth == 0:
                  result.extend(unescapeEndpointDescription("".join(escape)).replace("\\", "\\\\").replace(":", "\\:").replace("=", "\\="))
              else:
                  escape.append("}")
          else:
              if depth == 0:
                  result.append(char)
              else:
                  escape.append(char)
      if depth != 0:
          raise ValueError ("Endpoint description not valid: mismatched opening brace")
      return "".join(result)
Add a ModeType enum for later benefit
## Code Before:
def unescapeEndpointDescription(desc):
    result = []
    escape = []
    depth = 0
    desc = iter(desc)
    for char in desc:
        if char == "\\":
            try:
                char = desc.next()
            except StopIteration:
                raise ValueError ("Endpoint description not valid: escaped end of string")
            if char not in "{}":
                char = "\\{}".format(char)
            if depth == 0:
                result.extend(char)
            else:
                escape.extend(char)
        elif char == "{":
            if depth > 0:
                escape.append("{")
            depth += 1
        elif char == "}":
            depth -= 1
            if depth < 0:
                raise ValueError ("Endpoint description not valid: mismatched end brace")
            if depth == 0:
                result.extend(unescapeEndpointDescription("".join(escape)).replace("\\", "\\\\").replace(":", "\\:").replace("=", "\\="))
            else:
                escape.append("}")
        else:
            if depth == 0:
                result.append(char)
            else:
                escape.append(char)
    if depth != 0:
        raise ValueError ("Endpoint description not valid: mismatched opening brace")
    return "".join(result)
## Instruction:
Add a ModeType enum for later benefit
## Code After:
def _enum(**enums):
    return type('Enum', (), enums)

ModeType = _enum(List=0, ParamOnUnset=1, Param=2, NoParam=3, Status=4)

def unescapeEndpointDescription(desc):
    result = []
    escape = []
    depth = 0
    desc = iter(desc)
    for char in desc:
        if char == "\\":
            try:
                char = desc.next()
            except StopIteration:
                raise ValueError ("Endpoint description not valid: escaped end of string")
            if char not in "{}":
                char = "\\{}".format(char)
            if depth == 0:
                result.extend(char)
            else:
                escape.extend(char)
        elif char == "{":
            if depth > 0:
                escape.append("{")
            depth += 1
        elif char == "}":
            depth -= 1
            if depth < 0:
                raise ValueError ("Endpoint description not valid: mismatched end brace")
            if depth == 0:
                result.extend(unescapeEndpointDescription("".join(escape)).replace("\\", "\\\\").replace(":", "\\:").replace("=", "\\="))
            else:
                escape.append("}")
        else:
            if depth == 0:
                result.append(char)
            else:
                escape.append(char)
    if depth != 0:
        raise ValueError ("Endpoint description not valid: mismatched opening brace")
    return "".join(result)