Drop Python 3.6 and 3.7 support #891
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- Declares minimimum supported Python version as 3.7 in all packages - Removes compatibility code for Python <3.7 - Migrates to PEP563 style postponed evaluation of annotations - Applies ruff upgrade fixes for Python 3.7+ (`ruff check --target-version="py37" --select=UP --fix`) - UP008 Use `super()` instead of `super(__class__, self)` - UP015 [*] Unnecessary mode argument - UP020 [*] Use builtin `open` - UP026 [*] `mock` is deprecated, use `unittest.mock` - UP030 Use implicit references for positional format fields - UP032 [*] Use f-string instead of `format` call
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ruff- see Inferring the Python version)ruff check --target-version="py38" --select=UP --fix) - can be enforced following merge of Python linting throughruff#888tupleinstead ofTuplefor type annotationX | Yfor type annotations.super()instead ofsuper(__class__, self)openmockis deprecated, useunittest.mockformatcallEnables usage of PEP 563 postponed evaluation of annotations (
from __future__ import annotations) towards #878 - which would break for users who attempt to install and run the latest releases using Python 3.6.Enables removal of
attrsdependency through migration to the 3.7+ nativedataclasses(PEP 557) without installing backports and which provides improved type hinting and associated IDE support towards #878 - provided there are no constraints on retainingattrs.