Thanks Colin, I did already find that manual, but the only two useful things in
there for ordinary programmers is the zos_util documentation and the table of
"tagging" behavior.
There are also the zoautil command line utilities and python API, but the file
"read()" and "write()" functions there assume you can read/write the entire
file into/from memory. No "readline()" ow "writeline()" functions are provided
as far as I can see. And the "read()" and "write()" functions are quite slow
(6 to 9 seconds to read a 300-record LRECL=80 PDS member for instance).
I was hoping for better integration and performance than what I have seen so
far, as well as better z/OS-specific documentation. A "Programmers Guide" kind
of book.
Peter
-----Original Message-----
From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of
Colin Paice
Sent: Sunday, July 31, 2022 3:36 AM
To: IBM-MAIN@LISTSERV.UA.EDU
Subject: Re: Location of IBM python SDK language and standard library
documentation?
The manual SC28-3143-02 I*BM Open Enterprise SDK for Python 3.10* may be what
you want
import zos_util
f = open("//'USER.Z24C.PROCLIB(PYT)'","r")
read_data = f.read()
print(read_data)
gives
Traceback (most recent call last):
File "/u/tmp/zos/z.py", line 1, in <module>
f = open("//'USER.Z24C.PROCLIB(PYT)'","r")
FileNotFoundError: [Errno 129] EDC5129I No such file or directory.:
"//'USER.Z24C.PROCLIB(PYT)'"
I've blogged on several Python topics on z/OS ... see here
<https://urldefense.com/v3/__https://colinpaice.blog/category/python/__;!!Ebr-cpPeAnfNniQ8HSAI-g_K5b7VKg!N01KSqYEyXJOjU0ho5xjSSa-mOam2p_MmXx6GvuEKYJZN4Jw3NCavz64oy3NIhoCUpc9mWbZjmzLZNuTOtarBwZY9w$
>.
I'm currently looking at writing an extension to use fopen etc. and read
datasets, so please contact me offline if you would like more info
Colin
On Sun, 31 Jul 2022 at 00:03, Farley, Peter x23353 <
0000031df298a9da-dmarc-requ...@listserv.ua.edu> wrote:
> I have been looking around on various IBM websites trying to find the
> IBM versions of the normal python language and python standard library
> documentation to answer a few z/OS-specific python questions.
>
> 1. Does the z/OS implementation of the python language standard
> function "open()" accept z/OS Unix System Services file name format
> for MVS flat and PDS(E) datasets (e.g., "//'MVS.FLAT.FILE'" and
> "//'MVS.PDS(PDSMEM)'")? (I.E., under the covers does it use the "open()"
> or "fopen()" C library function?)
> 2. Is the "zos_util" library package available in all versions of the
> z/OS python SDK?
>
> TIA for any RTFM or url's you can point me to. PDF's of the
> documentation for offline reading would be welcome if they are available.
>
> Peter
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