"rlcompleter" --- GNU readline을 위한 완성 함수
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**소스 코드:** Lib/rlcompleter.py

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The "rlcompleter" module defines a completion function suitable to be
passed to "set_completer()" in the "readline" module.

When this module is imported on a Unix platform with the "readline"
module available, an instance of the "Completer" class is
automatically created and its "complete()" method is set as the
readline completer. The method provides completion of valid Python
identifiers and keywords.

예제:

   >>> import rlcompleter
   >>> import readline
   >>> readline.parse_and_bind("tab: complete")
   >>> readline. <TAB PRESSED>
   readline.__doc__          readline.get_line_buffer(  readline.read_init_file(
   readline.__file__         readline.insert_text(      readline.set_completer(
   readline.__name__         readline.parse_and_bind(
   >>> readline.

The "rlcompleter" module is designed for use with Python's interactive
mode.  Unless Python is run with the "-S" option, the module is
automatically imported and configured (see Readline 구성).

"readline"이 없는 플랫폼에서, 이 모듈이 정의하는 "Completer" 클래스는
여전히 사용자 정의 목적에 사용될 수 있습니다.

class rlcompleter.Completer

   Completer 객체는 다음과 같은 메서드를 가집니다:

   complete(text, state)

      Return the next possible completion for *text*.

      When called by the "readline" module, this method is called
      successively with "state == 0, 1, 2, ..." until the method
      returns "None".

      마침표("'.'")가 포함되지 않은 *text*로 호출되면, "__main__",
      "builtins" 및 키워드("keyword" 모듈에서 정의한 대로)에 현재 정의
      된 이름으로 완성됩니다.

      If called for a dotted name, it will try to evaluate anything
      without obvious side-effects (functions will not be evaluated,
      but it can generate calls to "__getattr__()") up to the last
      part, and find matches for the rest via the "dir()" function.
      Any exception raised during the evaluation of the expression is
      caught, silenced and "None" is returned.
