Release Notes
Abstract
This document contains a complete listing of releases, refreshes and fix packs (also known as PTFs) sorted by version for IBM Open Enterprise Python for z/OS. We recommend installing the latest PTFs as they are cumulative (i.e., they contain all of the APAR fixes available for the product since it was first shipped).
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Table of Contents (v3.13):
| Date Released | Status | Download |
|---|---|---|
November 26 2025 | Current | ShopZ |
Python for z/OS PTF: UO05885
| APAR | Description |
| PH68769 | This PTF contains bug fixes & updates to python |
| PH68770 | Fixed encoding errors when unexpected stdout/stderr tagging is set |
| PH68778 | Reduced CPU load during Python initialization with a large number of processes active |
| Date Released | Status | Download |
|---|---|---|
June 13 2025 | Current | ShopZ |
Python for z/OS PTF: UO03555
| APAR | Description |
| PH66757 | This PTF contains bug fixes & updates to python |
| PH66758 | This contains a bug fix |
| PH66017 | Double symlink to python binary containing a z/OS sysvar causes venv error |
| Date Released | Status | Download |
|---|---|---|
February 28 2025 | Superseded | ShopZ |
Python for z/OS PTF: UO02247
| APAR | Description |
| PH65203 | This PTF contains bug fixes & updates to Python |
| PH65204 | This contains a bug fix to 'pip check' command |
| PH65230 | Fixed an issue where the zIIP offloading eligibility was not re-enabled |
Table of Contents (v3.12):
October 2024 PTF (PE - Check APAR PH63959 for more details about the PE fix.)
| Date Released | Status | Download |
|---|---|---|
November 26 2025 | Current | ShopZ |
Python for z/OS PTF: UO05850
| APAR | Description |
| PH68765 | This PTF contains bug fixes & updates to Python |
| PH68766 | Fixed encoding errors when unexpected stdout/stderr tagging is set |
| PH68777 | Reduced CPU load during Python initialization with a large number of processes active |
| Date Released | Status | Download |
|---|---|---|
June 13 2025 | Superseded | ShopZ |
Python for z/OS PTF: UO03580
| APAR | Description |
| PH66761 | This PTF contains bug fixes & updates to Python |
| PH66762 | This contains a bug fix |
| PH66016 | Double symlink to python binary containing a z/OS sysvar causes venv error |
| Date Released | Status | Download |
|---|---|---|
February 28 2025 | Superseded | ShopZ |
Python for z/OS PTF: UO02232
| APAR | Description |
| PH65200 | This PTF contains bug fixes & updates to Python |
| PH65201 | This contains a bug fix to 'pip check' command |
| PH65231 | Fixed an issue where the zIIP offloading eligibility was not re-enabled |
| Date Released | Status | Download |
|---|---|---|
November 5 2024 | Superseded | ShopZ |
Python for z/OS PTF: UI98924
| APAR | Description |
| PH63959 | UI98700 has an incomplete structure, resulting in the SDK for PYTHON failing to install external packages 24/10/31 PTF PECHANGE |
| Date Released | Status | Download |
|---|---|---|
October 15 2024 | Superseded | ShopZ |
Python for z/OS PTF: UI98700 (PE - Do not apply)
| APAR | Description |
| PH63598 | This PTF contains bug fixes & updates to Python |
| PH63634 | This contains a bug fix |
| Date Released | Status | Download |
|---|---|---|
June 12 2024 | Superseded | ShopZ |
Python for z/OS PTF: UI97249
| APAR | Description |
| PH61733 | This PTF contains bug fixes & updates to PYTHON |
| Date Released | Status | Download |
|---|---|---|
March 03 2024 | Superseded | ShopZ |
Python for z/OS PTF: UI95738
| APAR | Description |
| PH59898 | This PTF contains bug fixes & updates to Python |
| PH59899 | Fixing os.set_tagging not recognizing binary mode |
| PH59900 | Fixed installing pip packages when files are tagged as EBCDIC |
Table of Contents (v3.11):
October 2024 PTF (PE - Check APAR PH63960 for more details about the PE fix.)
| Date Released | Status | Download |
|---|---|---|
June 13 2025 | Current | ShopZ |
Python for z/OS PTF: UO03559
| APAR | Description |
| PH66779 | This PTF contains bug fixes & updates to Python |
| PH66780 | This contains a bug fix |
| PH65695 | Double symlink to python binary containing a z/OS sysvar causes venv error |
| Date Released | Status | Download |
|---|---|---|
February 28 2025 | Superseded | ShopZ |
Python for z/OS PTF: UO02230
| APAR | Description |
| PH65197 | This PTF contains bug fixes & updates to Python |
| PH65198 | This contains a bug fix to 'pip check' command |
| PH65232 | Fixed an issue where the zIIP offloading eligibility was not re-enabled |
| Date Released | Status | Download |
|---|---|---|
November 5 2024 | Superseded | ShopZ |
Python for z/OS PTF: UI98927
| APAR | Description |
| PH63960 | UI98677 has an incomplete structure, resulting in the SDK for PYTHON failing to install external packages 24/10/31 PTF PECHANGE |
| Date Released | Status | Download |
|---|---|---|
October 15 2024 | Superseded | ShopZ |
Python for z/OS PTF: UI98677 (PE - Do not apply)
| APAR | Description |
| PH63594 | This PTF contains bug fixes & updates to Python |
| PH63623 | This contains a bug fix |
| Date Released | Status | Download |
|---|---|---|
June 13 2024 | Superseded | ShopZ |
Python for z/OS PTF: UI97244
| APAR | Description |
| PH61731 | This PTF contains bug fixes & updates to Python |
| Date Released | Status | Download |
|---|---|---|
March 3 2024 | Superseded | ShopZ |
Python for z/OS PTF: UI95727
| APAR | Description |
| PH59879 | This PTF contains bug fixes & updates to Python |
| PH59880 | Fix os.set_tagging not recognizing binary modeFix |
| PH59881 | Fix installing pip packages when files are tagged as EBCDIC |
| Date Released | Status | Download |
|---|---|---|
October 20 2023 | Superseded | ShopZ |
Python for z/OS PTF: UI94105
| APAR | Description |
| PH57671 | This PTF contains bug fixes & updates to Python |
| Date Released | Status | Download |
|---|---|---|
July 21 2023 | Superseded | ShopZ |
Python for z/OS PTF: UI92806
| APAR | Description |
| PH55880 | This PTF contains enhancements to Python zIIP enablement. |
| Date Released | Status | Download |
|---|---|---|
May 11 2023 | Superseded | ShopZ |
Python for z/OS PTF: UI91726
| APAR | Description |
| PH52983 | New Function: Added z Integrated Information Processor eligibility in IBM Open Enterprise SDK for Python 3.11. |
| Date Released | Status | Download |
|---|---|---|
April 02 2023 | Superseded | ShopZ |
Python for z/OS PTF: UI91094
| APAR | Description |
| PH53470 | This PTF updates cpython and contains various bug fixes. |
Table of Contents (v3.10):
| Date Released | Status | Download |
|---|---|---|
October 15 2024 | Current | ShopZ |
Python for z/OS PTF: UI98672
| APAR | Description |
| PH63592 | This PTF contains bug fixes & updates to Python |
| PH63626 | This contains a bug fix |
| Date Released | Status | Download |
|---|---|---|
June 13 2024 | Superseded | ShopZ |
Python for z/OS PTF: UI97226
| APAR | Description |
| PH61729 | This PTF contains bug fixes & updates to Python |
| Date Released | Status | Download |
|---|---|---|
March 03 2024 | Superseded | ShopZ |
Python for z/OS PTF: UI95726
| APAR | Description |
| PH59487 | Improvement to Python installation test |
| PH59876 | This PTF contains bug fixes & updates to Python |
| PH59877 | Fix os.set_tagging not recognizing binary mode |
| Date Released | Status | Download |
|---|---|---|
October 23 2023 | Current | ShopZ |
Python for z/OS PTF: UI94132
| APAR | Description |
| PH57729 | This PTF contains updates to Python |
| Date Released | Status | Download |
|---|---|---|
July 21st 2023 | Superseded | ShopZ |
Python for z/OS PTF: UI92802
| APAR | Description |
| PH55866 | This PTF contains various product fixes. |
| Date Released | Status | Download |
|---|---|---|
April 03 2023 | Superseded | ShopZ |
Python for z/OS PTF: UI91082
| APAR | Description |
| PH53438 | This PTF updates cpython and fixes various bugs. |
| Date Released | Status | Download |
|---|---|---|
November 21 2022 | Superseded | ShopZ |
Python for z/OS PTF: UI83387
| APAR | Description |
| PH51044 | This PTF contains various fixes. |
| Date Released | Status | Download |
|---|---|---|
November 01 2022 | Superseded | ShopZ |
Python for z/OS PTF: UI83043
| APAR | Description |
| PH50472 | This PTF updates cpython, pip, and setuptools. |
| Date Released | Status | Download |
|---|---|---|
July 01 2022 | Superseded | ShopZ |
Python for z/OS PTF: UI81228
| APAR | Description |
| PH47573 | This PTF updates CPYTHON to the community release 3.10.5. |
| Date Released | Status | Download |
|---|---|---|
April 22 2022 | Superseded | ShopZ |
Python for z/OS PTF: UI80261
| APAR | Description |
| PH45812 | This PTF updates CPython to the community release 3.10.2. |
Table of Contents (v3.9):
| Date Released | Status | Download |
|---|---|---|
June 13 2024 | Current | ShopZ |
.
Python for z/OS PTF: UI97222
| APAR | Description |
| PH61726 | This PTF contains bug fixes & updates to Python |
| Date Released | Status | Download |
|---|---|---|
Mar 03 2024 | Superseded | ShopZ |
.
Python for z/OS PTF: UI95725
| APAR | Description |
| PH59486 | Improvement to Python installation test |
| PH59870 | This PTF contains bug fixes & updates to Python |
| PH59871 | Fix os.set_tagging not recognizing binary mode |
| Date Released | Status | Download |
|---|---|---|
October 23 2023 | Superseded | ShopZ |
.
Python for z/OS PTF: UI94129
| APAR | Description |
| PH57726 | This PTF contains bug fixes & updates to Python |
| Date Released | Status | Download |
|---|---|---|
July 21 2023 | Superseded | ShopZ |
.
Python for z/OS PTF: UI92787
| APAR | Description |
| PH55814 | This PTF contains various product fixes. |
| Date Released | Status | Download |
|---|---|---|
April 02 2023 | Superseded | ShopZ |
.
Python for z/OS PTF: UI91093
| APAR | Description |
| PH53440 | This PTF updates cpython and contains various bug fixes. |
| Date Released | Status | Download |
|---|---|---|
November 21 2022 | Superseded | ShopZ |
.
Python for z/OS PTF: UI83386
| APAR | Description |
| PH51042 | This PTF contains various fixes. |
| Date Released | Status | Download |
|---|---|---|
November 01 2022 | Superseded | ShopZ |
.
Python for z/OS PTF: UI83042
| APAR | Description |
| PH50471 | This PTF updates cpython, pip, and setuptools. |
| Date Released | Status | Download |
|---|---|---|
June 30 2022 | Superseded | ShopZ |
.
Python for z/OS PTF: UI81227
| APAR | Description |
| PH47572 | This PTF updates CPython to the community release 3.9.13, and pip to 22.1.2. |
| Date Released | Status | Download |
|---|---|---|
April 22 2022 | Superseded | ShopZ |
.
Python for z/OS PTF: UI80260
| APAR | Description |
| PH45811 | This PTF updates CPython to the community release 3.9.11. |
| Date Released | Status | Download |
|---|---|---|
February 04 2022 | Superseded | ShopZ |
.
Python for z/OS PTF: UI79163
| APAR | Description |
| PH43812 | This PTF updates CPython to the community release 3.9.9. |
| Date Released | Status | Download |
|---|---|---|
November 05 2021 | Superseded | ShopZ |
.
Python for z/OS PTF: UI77958
| APAR | Description |
| PH41905 | This PTF updates OpenSSL to address several fixes. |
| Date Released | Status | Download |
|---|---|---|
July 10 2021 | Superseded | ShopZ |
.
Python for z/OS PTF: UI76255
| APAR | Description |
| PH38802 | This PTF updates CPython to the community release 3.9.5. |
| Date Released | Status | Download |
|---|---|---|
April 16 2021 | Superseded | ShopZ |
Python for z/OS PTF: UI74947
| APAR | Description |
| PH36344 | This PTF updates Python to the v3.9.2 community release. |
Table of Contents (v3.8):
| Date Released | Status | Download |
|---|---|---|
November 01 2022 | Current | ShopZ |
.
Python for z/OS PTF: UI83041
| APAR | Description |
| PH50475 | This PTF updates cpython, pip, and setuptools. |
| Date Released | Status | Download |
|---|---|---|
July 01 2022 | Current | ShopZ |
.
Python for z/OS PTF: UI81226
| APAR | Description |
| PH47571 | This PTF updates pip to 22.1.2 |
| Date Released | Status | Download |
|---|---|---|
April 22 2022 | Superseded | ShopZ |
.
Python for z/OS PTF: UI80259
| APAR | Description |
| PH45810 | This PTF updates CPython to the community release 3.8.13. |
| Date Released | Status | Download |
|---|---|---|
February 04 2022 | Superseded | ShopZ |
.
Python for z/OS PTF: UI79162
| APAR | Description |
| PH43810 | This PTF updates CPython to the community release 3.8.12. |
| Date Released | Status | Download |
|---|---|---|
November 05 2021 | Current | ShopZ |
.
Python for z/OS PTF: UI77957
| APAR | Description |
| PH41902 | This PTF updates OpenSSL to address several bugs. |
| Date Released | Status | Download |
|---|---|---|
July 10 2021 | Superseded | ShopZ |
.
Python for z/OS PTF: UI76259
| APAR | Description |
| PH38819 | This PTF updates CPython to the community release 3.8.10. |
| Date Released | Status | Download |
|---|---|---|
April 16 2021 | Superseded | ShopZ |
.
Python for z/OS PTF: UI74933
| APAR | Description |
| PH36308 | An update to IBM Open Enterprise Python for z/OS, V3R8 to the 3.8.8 community release. |
| Date Released | Status | Download |
|---|---|---|
November 30 2020 | Superseded | ShopZ |
.
Python for z/OS PTF: UI72789
| APAR | Description |
| PH32122 | An update to IBM Open Enterprise Python for z/OS, V3R8 to 3.8.6. |
| Date Released | Status | Download |
|---|---|---|
August 27 2020 | Superseded | ShopZ |
.
Python for z/OS PTF: UI71240
| APAR | Description |
| PH28769 | An update to IBM Open Enterprise Python for z/OS, V3R8 to 3.8.5. |
| Date Released | Status | Download |
|---|---|---|
July 29 2020 | Superseded | ShopZ |
.
Python for z/OS PTF: UI70749
| APAR | Description |
| PH27841 | An update to IBM Open Enterprise Python for z/OS, V3R8 to 3.8.3. |
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Modified date:
27 November 2025
UID
ibm16232646