Thanks for the reminder about the zoautil_py functions, I did know about them but there are gaps -- e.g. ZOAU has no direct support for simple sequential processing of VSAM files (e.g., to download a copy of VSAM data to a flat file in the Unix Services environment for analysis there). I have used a Rexx script that executes the FileManager batch utility program FMNMAIN to perform such functions. The FileManager batch program proved to be the most compatible in generating correct Unix Services output files for various flavors of VSAM input files where IDCAMS REPRO or DFSORT "OPTION COPY" outputs were less so.
Re: "ADDRESS TSO" needs - Rexx is not necessarily needed, as there is also the Unix Services command "tso" (or "tsocmd" for authorized services) to execute a single TSO command. The python subprocess.run() function could handle executing that command and capturing the output as needed. For more complicated "ADDRESS TSO" needs, yes one can execute a Rexx script in the Unix Services environment which uses "ADDRESS TSO" to execute a Rexx script also stored in that environment (or in an MVS library assigned to SYSEXEC) that then actually uses "ADDRESS TSO" functions. A bit Rube Goldberg, but it does work, as my recent experimentation with getting LISTDSI output from the Unix Services environment proved. Conceivably one could write that first Rexx script to set up an ISPF environment (all the needed DD's, etc.) and execute the second (functional) script in an ISPF environment (I haven't tried that yet; here there be dragons). Re: Writing an MVS I/O package for IBM python - ISTM that without documentation of the runtime architecture of the IBM python port (and also possibly access to the source of the port) it is not likely to succeed. OCO strikes again. The new DSFS functionality may or may not relieve the need for an MVS-specific I/O package. That remains to be seen. Peter -----Original Message----- From: IBM Mainframe Discussion List <IBM-MAIN@LISTSERV.UA.EDU> On Behalf Of Matt Hogstrom Sent: Monday, September 26, 2022 8:28 AM To: IBM-MAIN@LISTSERV.UA.EDU Subject: Re: IBM python documentation? If IIRC IBM loosely paired the IBM ZOAU to “assist Python”. https://community.ibm.com/community/user/ibmz-and-linuxone/blogs/austin-wells1/2020/12/11/using-ibm-open-enterprise-python-for-zos-and-zoau The challenge I see currently with Python is that is runs in a USS environment so if you need to “ADDRESS TSO” you need to call a REXX from Python in USS and do the other work. Its probably not going to happen but a “System” Python might fill that gap. Matt Hogstrom m...@hogstrom.org “It may be cognitive, but, it ain’t intuitive." — Hogstrom > On Sep 25, 2022, at 11:15 PM, David Crayford <dcrayf...@gmail.com> wrote: > > On 26/9/22 10:43, Charles Mills wrote: >>> It's trivial to write an MVS I/O package if you have a C compiler. >> One might ask then why IBM has not done so. > > I would suggest that they have not had a requirement. IBM use Python in their > analytics products and for new stuff like Ansible. Same with golang, they > need it for Kubernetes and OpenShift for z/CX containers. I doubt very much > if many customers have tried golang. It's a great language now it supports > generics. As fast as C++ with many advantages. > > >> Charles >> >> -----Original Message----- >> From: IBM Mainframe Discussion List [mailto:IBM-MAIN@LISTSERV.UA.EDU] >> On Behalf Of David Crayford >> Sent: Sunday, September 25, 2022 6:57 PM >> To: IBM-MAIN@LISTSERV.UA.EDU >> Subject: Re: IBM python documentation? >> >> On 26/9/22 07:34, Farley, Peter x23353 wrote: >>> I know Rocket's port of python has some documented enhancements to support >>> MVS dataset access among other things, but I have failed to find any >>> documentation on the IBM websites for an IBM-produced "python Programmers >>> Guide" (or similar) that would describe and provide examples for any >>> "IBM-specific" functional enhancements to the base language facilities. >>> >>> Is there any such documentation? Or are the python.org >>> documentation websites the only reference material available for the >>> IBM port of python? (i.e., no functional enhancements at all are >>> provided in the IBM port) >> Correct! It's trivial to write an MVS I/O package if you have a C compiler. -- This message and any attachments are intended only for the use of the addressee and may contain information that is privileged and confidential. If the reader of the message is not the intended recipient or an authorized representative of the intended recipient, you are hereby notified that any dissemination of this communication is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail and delete the message and any attachments from your system. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@listserv.ua.edu with the message: INFO IBM-MAIN
