since they are sometimes very slow.

program.

(EOF): New constant.
(TIMEOUT): New constant.
(CONT): New constant.
(BadArgs): New exception.
(_expect_before): New variable.
(_expect_after): New variable.
(expectable.fill_buffer): Treat EIO as end-of-file.  You apparently
	get this from a pty when the child exits, at least on Linux.
(spawn.send): Log what is sent via debug.
(impl.loop): Implement expect_before and expect_after.
(_expect_before): Removed.
(_expect_after): Removed.
(impl.__expect_before): New method.
(impl.__expect_after): New method.
(impl.__run_expectations): New method.
(expect_after): New function.
(expect_before): New function.
(__validate_expectations): New function.

simultaneously.

mandatory ftp demo.  Every expect module needs one.

for now it is written manually.

(stty_init): New variable.
(set_cloexec_flag): New function.
(spawn): New class.
(spawn.__init__): New method.
(spawn.send): New method.
(spawn.close): New method.

classes seems to work now.

(expectable.fill_buffer): Fix the eof handling.
(expectable.eof): Ditto.
(popen): New class.
(popen.__init__): New method.
(popen.close): New method.
(impl): Lots of calls to debug added to all methods.
(impl.loop): Fix syntax errors in expect_before and expect_after
calls.  Reset __acted.
(impl.__fill_buffer): New method.
(impl.re): Extract buffer-filling code to __fill_buffer.
(impl.eof): New method.
(_expect_before): New stub function.
(_expect_after): New stub function.
(debug): New stub function.
(Top level): Add a very simple test code.

(timeout_raises_exception): New variable.
(Timeout): New exception.
(expectable): New class.
(expectable.__init__): New method.
(expectable.fileno): New method.
(expectable.fill_buffer): New method.
(expectable.eof): New method.
(expectable.buffer): New method.
(expectable.remove_first): New method.
(impl): New class.
(impl.__init__): New method.
(impl.loop): New method.
(impl.re): New method.
(impl.timeout): New method.
(impl.cont): New method.

expect-like Python modules that are (more or less) available.