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        expecting any pattern).

        This is used by expect() when calling expect_list(). Thus expect() is
        nothing more than::

             cpl = self.compile_pattern_list(pl)
             return self.expect_list(cpl, timeout)

        If you are using expect() within a loop it may be more
        efficient to compile the patterns first and then call expect_list().
        This avoid calls in a loop to compile_pattern_list()::

             cpl = self.compile_pattern_list(my_pattern)
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��?�?�)�B�M�M�9�M� "����)�	*�F�C���!�T�6�6�7��.�.�q�1��%�,�,�R�Z�Z��=�-I�J��c��%�,�,�S�1��g��%�,�,�W�5��A�t�B�J�J�r�N�3�4��*�*�1�-��%�,�,�Q�/��&�&�q�)�	*�%�$rc��d|vr|jd�}|rtdj|���|j|�}|j	||||�S)a�This seeks through the stream until a pattern is matched. The
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        pattern list. If the pattern was not a list this returns index 0 on a
        successful match. This may raise exceptions for EOF or TIMEOUT. To
        avoid the EOF or TIMEOUT exceptions add EOF or TIMEOUT to the pattern
        list. That will cause expect to match an EOF or TIMEOUT condition
        instead of raising an exception.

        If you pass a list of patterns and more than one matches, the first
        match in the stream is chosen. If more than one pattern matches at that
        point, the leftmost in the pattern list is chosen. For example::

            # the input is 'foobar'
            index = p.expect(['bar', 'foo', 'foobar'])
            # returns 1('foo') even though 'foobar' is a "better" match

        Please note, however, that buffering can affect this behavior, since
        input arrives in unpredictable chunks. For example::

            # the input is 'foobar'
            index = p.expect(['foobar', 'foo'])
            # returns 0('foobar') if all input is available at once,
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        When a match is found for the given pattern, the class instance
        attribute *match* becomes an re.MatchObject result.  Should an EOF
        or TIMEOUT pattern match, then the match attribute will be an instance
        of that exception class.  The pairing before and after class
        instance attributes are views of the data preceding and following
        the matching pattern.  On general exception, class attribute
        *before* is all data received up to the exception, while *match* and
        *after* attributes are value None.

        When the keyword argument timeout is -1 (default), then TIMEOUT will
        raise after the default value specified by the class timeout
        attribute. When None, TIMEOUT will not be raised and may block
        indefinitely until match.

        When the keyword argument searchwindowsize is -1 (default), then the
        value specified by the class maxread attribute is used.

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        of raising the exception. The attribute 'after' will be set to the
        exception type. The attribute 'match' will be None. This allows you to
        write code like this::

                index = p.expect(['good', 'bad', pexpect.EOF, pexpect.TIMEOUT])
                if index == 0:
                    do_something()
                elif index == 1:
                    do_something_else()
                elif index == 2:
                    do_some_other_thing()
                elif index == 3:
                    do_something_completely_different()

        instead of code like this::

                try:
                    index = p.expect(['good', 'bad'])
                    if index == 0:
                        do_something()
                    elif index == 1:
                        do_something_else()
                except EOF:
                    do_some_other_thing()
                except TIMEOUT:
                    do_something_completely_different()

        These two forms are equivalent. It all depends on what you want. You
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                p = pexpect.spawn('/bin/ls')
                p.expect(pexpect.EOF)
                print p.before

        If you are trying to optimize for speed then see expect_list().

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        normally give directly. So, inside a coroutine, you can replace this code::

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        search to just the end of the input buffer.

        This method is also useful when you don't want to have to worry about
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