drop support for python 3.9 (#121)

* drop support for python 3.9

* Update README.md

* Update README.md

Author: yanghan234

.github/workflows/build.yaml

@@ -14,15 +14,15 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.10', '3.11', '3.12', '3.13']
 
     steps:
     - name: Checkout repository
       uses: actions/checkout@v3
 
     - name: Update environment.yaml with Python ${{ matrix.python-version }}
       run: |
-        sed -i.bak "s/- python=3.9/- python=${{ matrix.python-version }}/" environment.yaml
+        sed -i.bak "s/- python=3.10/- python=${{ matrix.python-version }}/" environment.yaml
         cat environment.yaml
 
     - name: Set up Micromamba
@@ -56,15 +56,15 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.10', '3.11', '3.12', '3.13']
 
     steps:
     - name: Checkout repository
       uses: actions/checkout@v3
 
     - name: Update environment.yaml with Python ${{ matrix.python-version }}
       run: |
-        sed -i.bak "s/- python=3.9/- python=${{ matrix.python-version }}/" environment.yaml
+        sed -i.bak "s/- python=3.10/- python=${{ matrix.python-version }}/" environment.yaml
         cat environment.yaml
 
     - name: Restore build artifacts

README.md

@@ -9,7 +9,7 @@
 <h4 align="center">
 
 [![arXiv](https://img.shields.io/badge/arXiv-2405.04967-blue?logo=arxiv&logoColor=white.svg)](https://arxiv.org/abs/2405.04967)
-[![Requires Python 3.9+](https://img.shields.io/badge/Python-3.9+-blue.svg?logo=python&logoColor=white)](https://python.org/downloads)
+[![Requires Python 3.10+](https://img.shields.io/badge/Python-3.10+-blue.svg?logo=python&logoColor=white)](https://python.org/downloads)
 [![PyPI Downloads](https://static.pepy.tech/badge/mattersim)](https://pepy.tech/projects/mattersim)
 </h4>
 
@@ -23,7 +23,7 @@ This README provides a quick start guide. For more comprehensive information, pl
 ## Installation
 
 ### Prerequisite
-* `Python >= 3.9`
+* `Python >= 3.10`
 
 
 ### Install from PyPI
@@ -32,13 +32,12 @@ This README provides a quick start guide. For more comprehensive information, pl
 >
 > ```bash
 > # create the environment
-> conda create -n mattersim python=3.9
+> conda create -n mattersim python=3.10
 >
 > # activate the environment
 > conda activate mattersim
 > ```
 >
-> Although MatterSim can be installed with `Python > 3.9`, we recommend using `Python == 3.9` for optimal compatibility.
 
 To install MatterSim, use the following command. Please note that downloading the dependencies may take some time:
 ```bash

environment.yaml

@@ -2,7 +2,7 @@ name: mattersim
 channels:
   - conda-forge
 dependencies:
-  - python=3.9
+  - python=3.10
   - ca-certificates
   - openssl
   - cython>=0.29.32

pyproject.toml

@@ -1,7 +1,7 @@
 [build-system]
 requires = [
     "Cython>=0.29.32",
-    "numpy>=2.0.0   ",
+    "numpy>=2.0.0",
     "setuptools>=45",
     "setuptools_scm",
     "wheel",
@@ -19,7 +19,7 @@ authors = [
     { name = "Ziheng Lu", email = "zihenglu@microsoft.com" },
 ]
 readme = "README.md"
-requires-python = ">=3.9"
+requires-python = ">=3.10"
 classifiers = [
     "License :: OSI Approved :: MIT License",
     "Operating System :: OS Independent",
@@ -37,7 +37,8 @@ dependencies = [
     "emmet-core<0.84; python_version < '3.10'",
     "loguru",
     "mp-api",
-    "numpy>=2.0.0",
+    "numpy>=2.0.0; python_version >= '3.10'",
+    "numpy<2.0.0; python_version < '3.10'",
     "opt_einsum_fx",
     "pydantic>=2.9.2",
     "pymatgen",