[andrewelamb]

Problem:

• Python 3.15 is released, but the client declares python_requires = >=3.11, <3.15. Users cannot install synapseclient on Python 3.15 with pip.
• CI does not test on Python 3.15.
• The docs (README, CONTRIBUTING, installation tutorial, CLAUDE.md) list 3.14 as the newest supported version.

Solution:

This PR follows the "Adding a new Python version" checklist in CONTRIBUTING.md.

Package metadata (setup.cfg)

• Add the Programming Language :: Python :: 3.15 classifier.
• Change python_requires to >=3.11, <3.16.

CI (.github/workflows/build.yml, .github/workflows/validate-release.yml)

• Add 3.15 to the unit-tests matrix and to the check-deploy matrix.
• Integration tests now run on the oldest and newest versions, 3.11 and 3.15 (before: 3.11 and 3.14). The 3.15 jobs now use the Test{Ubuntu,Windows,Macos}MaximumPython Synapse profiles. Python 3.14 still gets unit tests on all platforms.
• validate-release now uses Python 3.15.

Docs

• README.md, CONTRIBUTING.md, docs/tutorials/installation.md and CLAUDE.md now show 3.15 as the newest supported version. The examples in the CONTRIBUTING version checklist now use 3.16.

Download code (synapseclient/core/download/download_functions.py)

• On Python 3.15, the filename parameter of os.path.getsize is positional-only. Two calls used os.path.getsize(filename=temp_destination), which raised TypeError: getsize() got some positional-only arguments passed as keyword arguments: 'filename'. This made tests/unit/synapseclient/core/unit_test_download.py::test_mock_download fail on 3.15. Both calls now pass the argument by position.

[linglp]

The docker file is currently FROM python:3.14-slim, but that would need to be updated if we want to support 3.15? Also, in the pyproject.toml should also be updated? Currently, there's target-version = ['py311']

[andrewelamb]

The docker file is currently FROM python:3.14-slim, but that would need to be updated if we want to support 3.15?

Yep, looks like I had a commit that didn't get pushed!

Also, in the pyproject.toml should also be updated? Currently, there's target-version = ['py311']

target-version sets the minimum syntax level, so py311 is correct for python_requires >=3.11. Also, black 26.3.1 does not accept py315.

[linglp]

This LGTM. But I noticed some integration tests failure:

=========================== short test summary info ===========================
FAILED tests/integration/synapseclient/models/async/test_table_async.py::TestRowStorage::test_store_rows_from_df_with_datetime_columns - synapseclient.core.exceptions.SynapseHTTPError: 400 Client Error: Value at [0,1] was not a valid DATE. Invalid format: "1609502400000.0" is malformed at "0000.0"
FAILED tests/integration/synapseclient/models/async/test_table_async.py::TestRowStorage::test_store_rows_with_quotes_and_apostrophes_ellipses - synapseclient.core.exceptions.SynapseHTTPError: 400 Client Error: Value at [0,5] was not a valid INTEGER. For input string: "10.0"
FAILED tests/integration/synapseclient/models/async/test_entityview_async.py::TestEntityView::test_update_rows_and_annotations - AssertionError: Series are different

Series values are different (75.0 %)
[index]: [0, 1, 2, 3]
[left]:  [None, None, None, value4]
[right]: <StringArray>
['value1', 'value2', 'value3', 'value4']
Length: 4, dtype: str
At positional index 0, first diff: None != 'value1'
FAILED tests/integration/synapseclient/models/async/test_table_async.py::TestUpsertRows::test_upsert_all_data_types_using_dataframe - synapseclient.core.exceptions.SynapseHTTPError: 400 Client Error: Value at [0,2] was not a valid INTEGER. For input string: "1.0"
FAILED tests/integration/synapseclient/models/async/test_table_async.py::TestUpsertRows::test_upsert_all_data_types_using_csv - synapseclient.core.exceptions.SynapseHTTPError: 400 Client Error: Value at [0,2] was not a valid INTEGER. For input string: "11.0"
ERROR tests/integration/synapseclient/models/async/test_table_async.py::TestQuerying::test_query_to_csv - synapseclient.core.exceptions.SynapseHTTPError: 400 Client Error: Value at [0,1] was not a valid INTEGER. For input string: "1.0"
ERROR tests/integration/synapseclient/models/async/test_table_async.py::TestQuerying::test_part_mask_query_everything - synapseclient.core.exceptions.SynapseHTTPError: 400 Client Error: Value at [0,1] was not a valid INTEGER. For input string: "1.0"
ERROR tests/integration/synapseclient/models/async/test_table_async.py::TestQuerying::test_part_mask_query_results_only - synapseclient.core.exceptions.SynapseHTTPError: 400 Client Error: Value at [0,1] was not a valid INTEGER. For input string: "1.0"
=

Could you help look into the failures and make sure the integration tests all pass before merging?