源代码： Lib/rlcompleter.py
The rlcompleter 模块定义的补全函数适于 readline 模块，通过补全有效 Python 标识符和关键词。
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() 方法会被设为 readline 补全器。
范例：
>>> 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. A user can add the following lines to his or her initialization file (identified by the PYTHONSTARTUP environment variable) to get automatic Tab completion:
try: import readline except ImportError: print "Module readline not available." else: import rlcompleter readline.parse_and_bind("tab: complete")
On platforms without readline ， Completer 类 (由本模块定义) 仍可用于自定义目的。
补全器对象具有下列方法：
返回 state th completion for text .
If called for text that doesn’t include a period character ( '.' ), it will complete from names currently defined in __main__ , __builtin__ and keywords (as defined by the keyword 模块)。
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 被返回。
