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TL;DR: Is there a way to properly encode received bytes using EBCDIC ?

Hello,

while working with sockets I noticed that python always expects and EBCDIC string.

I have currently been able to get a Python client-server configuration (Linux client, z/OS server) to communicate by forcing the client to use ‘cp500’ encoding, but I haven’t been able to do the same server-side (decoding Latin-1 to EBCDIC).

This is what I tried up until now:

>>> import codecs, sys
>>> test = ‘\\x48\\x54\\x54\\x50’
>>> test.encode(‘cp500’)
UnicodeDecodeError: ‘ascii’ codec can’t decode byte 0x48 in position 0: ordinal not in range(128)

I also tried by setting the default encoding to ‘cp500’ with:

>>> reload(sys)
>>> sys.setdefaultencoding(‘cp500’)
>>> test.decode(‘Latin1’)
u’\\x48\\x54\\x54&’

Still, without success.

Any hints?

TL;DR: Is there a way to properly encode received bytes using EBCDIC ?

Hello,

while working with sockets I noticed that python always expects and EBCDIC string.

I have currently been able to get a Python client-server configuration (Linux client, z/OS server) to communicate by forcing the client to use ‘cp500’ encoding, but I haven’t been able to do the same server-side (decoding Latin-1 to EBCDIC).

This is what I tried up until now:

>>> import codecs, sys
>>> test = ‘\\x48\\x54\\x54\\x50’
>>> test.encode(‘cp500’)
UnicodeDecodeError: ‘ascii’ codec can’t decode byte 0x48 in position 0: ordinal not in range(128)

I also tried by setting the default encoding to ‘cp500’ with:

>>> reload(sys)
>>> sys.setdefaultencoding(‘cp500’)
>>> test.decode(‘Latin1’)
u’\\x48\\x54\\x54&’

Still, without success.

Any hints?

try this:

>>> test = '\\x48\\x54\\x54\\x50'
>>> test.decode('latin1')                  # convert latin1 byte string to unicode
u'HTTP'
>>> test.decode('latin1').encode('cp500')  # and then convert further to EBCDIC
'\\xc8\\xe3\\xe3\\xd7'
>>>

TL;DR: Is there a way to properly encode received bytes using EBCDIC ?

Hello,

while working with sockets I noticed that python always expects and EBCDIC string.

I have currently been able to get a Python client-server configuration (Linux client, z/OS server) to communicate by forcing the client to use ‘cp500’ encoding, but I haven’t been able to do the same server-side (decoding Latin-1 to EBCDIC).

This is what I tried up until now:

>>> import codecs, sys
>>> test = ‘\\x48\\x54\\x54\\x50’
>>> test.encode(‘cp500’)
UnicodeDecodeError: ‘ascii’ codec can’t decode byte 0x48 in position 0: ordinal not in range(128)

I also tried by setting the default encoding to ‘cp500’ with:

>>> reload(sys)
>>> sys.setdefaultencoding(‘cp500’)
>>> test.decode(‘Latin1’)
u’\\x48\\x54\\x54&’

Still, without success.

Any hints?

Hello!

Try to use this code:

import codecs
test = '\\x48\\x54\\x54\\x50’
ascii_text = codecs.decode(test, ‘cp437’)
print (ascii_text)
ebcdic_text = codecs.encode(ascii_text, ‘cp500’)
print (ebcdic_text)

try this:

>>> test = '\\x48\\x54\\x54\\x50'
>>> test.decode('latin1')                  # convert latin1 byte string to unicode
u'HTTP'
>>> test.decode('latin1').encode('cp500')  # and then convert further to EBCDIC
'\\xc8\\xe3\\xe3\\xd7'
>>>

Unfortunately this doesn’t work:

>>> test.decode(‘latin1’).encode(‘cp500’)
’\\x48\\x54\\x54&’

Hello!

Try to use this code:

import codecs
test = '\\x48\\x54\\x54\\x50’
ascii_text = codecs.decode(test, ‘cp437’)
print (ascii_text)
ebcdic_text = codecs.encode(ascii_text, ‘cp500’)
print (ebcdic_text)

For some reason this works, thanks:

>>> import codecs
>>> test = ‘\\x48\\x54\\x54\\x50’
>>> ascii_text = codecs.decode(test, ‘cp437’)
>>> print ascii_text
HTTP

I also found another solution, which is to use the module “oe2a.py” posted here on the forum (just remove the last backslash).

Now that I am able to decode/encode ascii properly the problem shifted to socket.py, I think that the readline/read/write functions will need the proper changes.

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