# `rlcompleter` --- GNU readline の補完機能

ソースコード: Lib/rlcompleter.py

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.

以下はプログラム例です:

    >>> 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 の設定).

`readline` のないプラットフォームでも、このモジュールで定義される `Completer` クラスは独自の目的に使えます。

class rlcompleter.Completer

  Completerオブジェクトは以下のメソッドを持っています:

  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`.

    もし text がピリオド(`'.'`)を含まない場合、 `__main__` 、 `builtins` で定義されている名前か、キーワード (`keyword` モジュールで定義されている) から補完されます。

    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.