auto
     5ˆÍÌ„DÓ¿Ë¿Ï ?÷     5from io import StringIO, BytesIO
import codecs
import os
import sys
import re
import errno
from .exceptions import ExceptionPexpect, EOF, TIMEOUT
from .expect import Expecter, searcher_string, searcher_re

PY3 = (sys.version_info[0] >= 3)
text_type = str if PY3 else unicode

class _NullCoder(object):
    """Pass bytes through unchanged."""
    @staticmethod
    def encode(b, final=False):
        return b

    @staticmethod
    def decode(b, final=False):
        return b

class SpawnBase(object):
    """A base class providing the backwards-compatible spawn API for Pexpect.

    This should not be instantiated directly: use :class:`pexpect.spawn` or
    :class:`pexpect.fdpexpect.fdspawn`.
    """
    encoding = None
    pid = None
    flag_eof = False

    def __init__(self, timeout=30, maxread=2000, searchwindowsize=None,
                 logfile=None, encoding=None, codec_errors='strict'):
        self.stdin = sys.stdin
        self.stdout = sys.stdout
        self.stderr = sys.stderr

        self.searcher = None
        self.ignorecase = False
        self.before = None
        self.after = None
        self.match = None
        self.match_index = None
        self.terminated = True
        self.exitstatus = None
        self.signalstatus = None
        # status returned by os.waitpid
        self.status = None
        # the child file descriptor is initially closed
        self.child_fd = -1
        self.timeout = timeout
        self.delimiter = EOF
        self.logfile = logfile
        # input from child (read_nonblocking)
        self.logfile_read = None
        # output to send (send, sendline)
        self.logfile_send = None
        # max bytes to read at one time into buffer
        self.maxread = maxread
        # Data before searchwindowsize point is preserved, but not searched.
        self.searchwindowsize = searchwindowsize
        # Delay used before sending data to child. Time in seconds.
        # Set this to None to skip the time.sleep() call completely.
        self.delaybeforesend = 0.05
        # Used by close() to give kernel time to update process status.
        # Time in seconds.
        self.delayafterclose = 0.1
        # Used by terminate() to give kernel time to update process status.
        # Time in seconds.
        self.delayafterterminate = 0.1
        # Delay in seconds to sleep after each call to read_nonblocking().
        # Set this to None to skip the time.sleep() call completely: that
        # would restore the behavior from pexpect-2.0 (for performance
        # reasons or because you don't want to release Python's global
        # interpreter lock).
        self.delayafterread = 0.0001
        self.softspace = False
        self.name = '<' + repr(self) + '>'
        self.closed = True

        # Unicode interface
        self.encoding = encoding
        self.codec_errors = codec_errors
        if encoding is None:
            # bytes mode (accepts some unicode for backwards compatibility)
            self._encoder = self._decoder = _NullCoder()
            self.string_type = bytes
            self.buffer_type = BytesIO
            self.crlf = b'\r\n'
            if PY3:
                self.allowed_string_types = (bytes, str)
                self.linesep = os.linesep.encode('ascii')
                def write_to_stdout(b):
                    try:
                        return sys.stdout.buffer.write(b)
                    except AttributeError:
                        # If stdout has been replaced, it may not have .buffer
                        return sys.stdout.write(b.decode('ascii', 'replace'))
                self.write_to_stdout = write_to_stdout
            else:
                self.allowed_string_types = (basestring,)  # analysis:ignore
                self.linesep = os.linesep
                self.write_to_stdout = sys.stdout.write
        else:
            # unicode mode
            self._encoder = codecs.getincrementalencoder(encoding)(codec_errors)
            self._decoder = codecs.getincrementaldecoder(encoding)(codec_error