restore support of Python 3.6/3.7

.github/workflows/main.yml

@@ -4,11 +4,13 @@ on: [push]
 
 jobs:
   build:
+    name: "os: ${{ matrix.os }}, python: ${{ matrix.python-version }}"
     runs-on: ${{ matrix.os }}
 
     strategy:
       matrix:
         os: ['ubuntu-20.04', 'ubuntu-22.04']
+        python-version: ['3.6', '3.11']
       fail-fast: false
 
     steps:
@@ -17,7 +19,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@v5
         with:
-          python-version: 3.8
+          python-version: ${{ matrix.python-version }}
 
       - name: apt
         run: |

CMakeLists.txt

@@ -66,7 +66,7 @@ include_directories(${Boost_INCLUDE_DIRS})
 
 include_directories(${CMAKE_CURRENT_SOURCE_DIR}/src/third-party/plog)
 
-set(python_version_required 3.8)
+set(python_version_required 3.6)
 
 if(NOT PYTHON_EXECUTABLE)
   if(BUILD_NEW_GENERATORS OR Testing OR Document)

README.md

@@ -29,10 +29,11 @@ DSQSS implements the path-integral Monte Carlo method with the directed loop alg
 
 - C++ Compiler
 - CMake >=2.8.12
-- Python >=3.8
+- Python >=3.6
   - numpy
   - scipy
   - toml
+  - typing_extensions (if Python < 3.8)
 
 ### Simple build
 

doc/en/dsqss/install.rst

@@ -8,12 +8,12 @@ Requirements
 ********************
 
 - (Optional) MPI (essential for PMWA)
-- python 3.8+
+- python 3.6+
 
    - numpy
    - scipy
    - toml
-   - pip (essential for ``make install``)
+   - typing_extensions (if python 3.6 or 3.7 is used)
 
 Download
 ********************

doc/jp/dsqss/install.rst

@@ -9,11 +9,12 @@
 DSQSSの使用には以下のプログラム・ライブラリが必要です. 
 
 - (Optional) MPI (PMWAを使用する場合には必須)
-- python 3.8+
+- python 3.6+
 
    - numpy
    - scipy
    - toml
+   - typing_extensions (Python 3.6, 3.7 の場合)
 
 
 ダウンロード

tool/dsqss/prob_kernel.py

@@ -14,7 +14,13 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-from typing import Sequence, Protocol
+from typing import Sequence
+
+import sys
+if sys.version_info >= (3, 8):
+    from typing import Protocol
+else:
+    from typing_extensions import Protocol
 
 import numpy as np
 

tool/pyproject.toml

@@ -12,11 +12,12 @@ packages = [
   ]
 
 [tool.poetry.dependencies]
-python = "^3.8"
+python = "^3.6"
 # Users should install dependencies by themselves
 # numpy = "^1.17"
 # toml = ">= 0.10.0"
 # scipy = "^1"
+# typing_extension for python<3.8
 
 [tool.poetry.dev-dependencies]