Fix Python version syntax

Author: akihironitta

.github/workflows/ci_integrate.yml

@@ -25,11 +25,11 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-20.04, macOS-10.15, windows-2019]
-        python-version: [3.7, 3.10]
+        python-version: ['3.7', '3.10']
         requires: ['oldest', 'latest']
         exclude:
-          - {python-version: 3.7, requires: 'latest'}
-          - {python-version: 3.10, requires: 'oldest'}
+          - {python-version: '3.7', requires: 'latest'}
+          - {python-version: '3.10', requires: 'oldest'}
     env:
       PYTEST_ARTEFACT: test-results-${{ matrix.os }}-py${{ matrix.python-version }}-${{ matrix.requires }}.xml
       PYTORCH_URL: https://download.pytorch.org/whl/cpu/torch_stable.html

.github/workflows/ci_test-conda.yml

@@ -29,12 +29,12 @@ jobs:
         python-version: ["3.8"]
         pytorch-version: ["1.4", "1.5", "1.6", "1.7", "1.8", "1.9", "1.10", "1.11"]
         include:
-          - {python-version: 3.7, pytorch-version: '1.3'}
-          - {python-version: 3.9, pytorch-version: '1.12'}
-          - {python-version: 3.9, pytorch-version: '1.13'}
-          - {python-version: 3.10, pytorch-version: '1.11'}
-          - {python-version: 3.10, pytorch-version: '1.12'}
-          - {python-version: 3.10, pytorch-version: '1.13'}
+          - {python-version: '3.7', pytorch-version: '1.3'}
+          - {python-version: '3.9', pytorch-version: '1.12'}
+          - {python-version: '3.9', pytorch-version: '1.13'}
+          - {python-version: '3.10', pytorch-version: '1.11'}
+          - {python-version: '3.10', pytorch-version: '1.12'}
+          - {python-version: '3.10', pytorch-version: '1.13'}
     env:
       PYTEST_ARTEFACT: test-conda-py${{ matrix.python-version }}-pt${{ matrix.pytorch-version }}.xml
 

.github/workflows/ci_test-full.yml

@@ -28,11 +28,11 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-20.04, macOS-10.15, windows-2019]
-        python-version: [3.7, 3.8, 3.9, 3.10]
+        python-version: ['3.7', '3.8', '3.9', '3.10']
         requires: ['oldest', 'latest']
         exclude:
-          - {python-version: 3.7, requires: 'latest'}
-          - {python-version: 3.10, requires: 'oldest'}
+          - {python-version: '3.7', requires: 'latest'}
+          - {python-version: '3.10', requires: 'oldest'}
     env:
       PYTEST_ARTEFACT: test-results-${{ matrix.os }}-py${{ matrix.python-version }}-${{ matrix.requires }}.xml
       PYTORCH_URL: https://download.pytorch.org/whl/cpu/torch_stable.html