Mark python 3.6 unsupported (#617)

* Mark python 3.6 unsupported in setup.py

* Update changelog

* Drop py3.6 from CI

* Update docs

* Update python code

.github/workflows/health_check.yml

@@ -8,7 +8,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ['3.6', '3.7', '3.8', '3.9']
+        python-version: ['3.7', '3.8', '3.9']
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
@@ -24,6 +24,6 @@ jobs:
           pytest -v --cov --cov-report xml:coverage.xml
           datum -h
       - name: Sending coverage results
-        if: matrix.python-version == '3.6'
+        if: matrix.python-version == '3.7'
         run: |
           bash <(curl -Ls https://coverage.codacy.com/get.sh) report -r coverage.xml -t ${{ secrets.CODACY_PROJECT_TOKEN }}

.github/workflows/pr_checks.yml

@@ -18,7 +18,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ['macos-10.15', 'ubuntu-20.04', 'windows-2016']
-        python-version: ['3.6', '3.7', '3.8', '3.9']
+        python-version: ['3.7', '3.8', '3.9']
     name: build and test (${{ matrix.os }}, Python ${{ matrix.python-version }})
     runs-on: ${{ matrix.os }}
     steps:

CHANGELOG.md

@@ -28,7 +28,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - TBD
 
 ### Removed
-- TBD
+- Official support of Python 3.6 (due to it's EOL)
+  (<https://github.com/openvinotoolkit/datumaro/pull/617>)
 
 ### Fixed
 - Fails in multimerge when lines are not approximated and when there are no

datumaro/util/attrs_util.py

@@ -22,13 +22,7 @@ def validator(inst, attribute, value):
                 value = default
         else:
             dst_type = None
-            if attribute.type and inspect.isclass(attribute.type) and \
-                    not hasattr(attribute.type, '__origin__'):
-                #       ^^^^^^^
-                # Disallow Generics in python 3.6
-                # Can be dropped with 3.6 support. Generics canot be used
-                # in isinstance() checks.
-
+            if attribute.type and inspect.isclass(attribute.type):
                 dst_type = attribute.type
             elif conv and inspect.isclass(conv):
                 dst_type = conv

setup.py

@@ -67,7 +67,7 @@ def parse_requirements(filename=CORE_REQUIREMENTS_FILE):
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
     ],
-    python_requires='>=3.6',
+    python_requires='>=3.7',
     install_requires=CORE_REQUIREMENTS,
     extras_require={
         'tf': ['tensorflow'],

site/content/en/docs/contributing.md

@@ -14,7 +14,7 @@ weight: 50
 
 ### Prerequisites
 
-- Python (3.6+)
+- Python (3.7+)
 
 ``` bash
 git clone https://github.com/openvinotoolkit/datumaro

site/content/en/docs/getting_started.md

@@ -12,7 +12,7 @@ To read about the design concept and features of Datumaro, go to the [design sec
 
 ### Dependencies
 
-- Python (3.6+)
+- Python (3.7+)
 - Optional: OpenVINO, TensorFlow, PyTorch, MxNet, Caffe, Accuracy Checker
 
 Optionally, create a virtual environment:

site/content/en/docs/user-manual/installation.md

@@ -7,7 +7,7 @@ weight: 1
 
 ### Dependencies
 
-- Python (3.6+)
+- Python (3.7+)
 - Optional: OpenVINO, TensorFlow, PyTorch, MxNet, Caffe, Accuracy Checker
 
 ### Installation steps