The stdin buffer problem in the py3270

[Aiden Luo]

Hi Randy,

I create a project based on the py3270 package, but I found some problem in the py3270.

Example:

================================================

>>> b.rcms.string_get(14, 27, 8)

'11/10/20'

>>> b.rcms.string_get(12, 27, 8)

'14/10/19'

>>> b.rcms.string_get(12, 27, 8)

'11/10/20'

>>> b.rcms.string_get(14, 27, 8)

'11/10/20'

>>> b.rcms.string_get(14, 27, 8)

Traceback (most recent call last):

  File "<pyshell#58>", line 1, in <module>

    b.rcms.string_get(14, 27, 8)

  File "C:\Program Files\Python27\lib\site-packages\py3270-0.1.5-py2.7.egg\py3270\__init__.py", line 276, in string_get

    assert len(cmd.data) == 1, cmd.data

AssertionError: []

>>> b.rcms.string_get(14, 27, 8)

Traceback (most recent call last):

  File "<pyshell#59>", line 1, in <module>

    b.rcms.string_get(14, 27, 8)

  File "C:\Program Files\Python27\lib\site-packages\py3270-0.1.5-py2.7.egg\py3270\__init__.py", line 274, in string_get

    cmd = self.exec_command('Ascii({0},{1},{2})'.format(ypos, xpos, length))

  File "C:\Program Files\Python27\lib\site-packages\py3270-0.1.5-py2.7.egg\py3270\__init__.py", line 158, in exec_command

    c.execute()

  File "C:\Program Files\Python27\lib\site-packages\py3270-0.1.5-py2.7.egg\py3270\__init__.py", line 50, in execute

    return self.handle_result(result)

  File "C:\Program Files\Python27\lib\site-packages\py3270-0.1.5-py2.7.egg\py3270\__init__.py", line 68, in handle_result

    raise CommandError(msg)

CommandError: Unknown action: scii

>>> b.rcms.string_get(14, 27, 8)

'14/10/19'

==============================================

the "b.rcms" is a Emulator instance, it seems that the py3270 has some buffer problem.

I try to  resolved the problem through add stdin.flush() to the class command, like this:

class Command(object):

    """

        Represents a x3270 script command

    """

    def __init__(self, sp, cmdstr):

        self.sp = sp

        self.cmdstr = cmdstr

        self.status_line = None

        self.data = []

        self.sp.stdin.flush()

        ............................

Now, the py3270 seems work normal. 

Hope it useful.

[Randy Syring]

Thanks so much for this report!  I was just having similar problems, but didn't have time to troubleshoot further.

Randy Syring
Development | Executive Director
Direct: 502.276.0459
Office: 812.285.8766

Principled People | Technology that Works

--
You received this message because you are subscribed to the Google Groups "BlazeLibs" group.
To unsubscribe from this group and stop receiving emails from it, send an email to blazelibs+...@googlegroups.com.
For more options, visit https://groups.google.com/groups/opt_out.
 
 

[Randy Syring]

It seems to me that he proper place to put the .flush() is after we send data to the pipe.  I made this fix:

https://bitbucket.org/rsyring/py3270/commits/34d9358f3ea831014e86afa1c4af828bfc913f76

Can you please pull py3270 tip from bitbucket and see if this change also fixes your problem?

Thanks so much for the feedback!

Randy Syring
Development | Executive Director
Direct: 502.276.0459
Office: 812.285.8766

Principled People | Technology that Works

On 07/25/2013 01:35 AM, Aiden Luo wrote: