Remove support for Python 3.8 (#494)

Author: fealho

.github/workflows/end_to_end.yml

@@ -10,11 +10,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
         os: [ubuntu-latest, windows-latest]
         include:
           - os: macos-latest
-            python-version: '3.8'
+            python-version: '3.9'
           - os: macos-latest
             python-version: '3.13'
     steps:

.github/workflows/minimum.yml

@@ -14,11 +14,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
         os: [ubuntu-latest, windows-latest]
         include:
           - os: macos-latest
-            python-version: '3.8'
+            python-version: '3.9'
           - os: macos-latest
             python-version: '3.13'
     steps:

.github/workflows/numerical.yml

@@ -14,11 +14,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
         os: [ubuntu-latest, windows-latest]
         include:
           - os: macos-latest
-            python-version: '3.8'
+            python-version: '3.9'
           - os: macos-latest
             python-version: '3.13'
     steps:

.github/workflows/readme.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
         os: [ubuntu-latest, macos-latest]
     steps:
     - uses: actions/checkout@v4

.github/workflows/tutorials.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python ${{ matrix.python-version }}

.github/workflows/unit.yml

@@ -14,11 +14,11 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12', '3.13']
+        python-version: ['3.9', '3.10', '3.11', '3.12', '3.13']
         os: [ubuntu-latest, windows-latest]
         include:
           - os: macos-latest
-            python-version: '3.8'
+            python-version: '3.9'
           - os: macos-latest
             python-version: '3.13'
     steps:

INSTALL.md

@@ -3,7 +3,7 @@
 ## Requirements
 
 **Copulas** has been developed and tested on
-[Python 3.8, 3.9, 3.10 and 3.11](https://www.python.org/downloads/)
+[Python 3.9, 3.10, 3.11, 3.12 and 3.13](https://www.python.org/downloads/)
 
 Also, although it is not strictly required, the usage of a [virtualenv](
 https://virtualenv.pypa.io/en/latest/) is highly recommended in order to avoid

copulas/multivariate/vine.py

@@ -1,7 +1,6 @@
 """VineCopula module."""
 
 import logging
-import sys
 import warnings
 
 import numpy as np
@@ -74,10 +73,9 @@ class VineCopula(Multivariate):
 
     @store_args
     def __init__(self, vine_type, random_state=None):
-        if sys.version_info > (3, 8):
-            warnings.warn(
-                'Vines have not been fully tested on Python >= 3.8 and might produce wrong results.'
-            )
+        warnings.warn(
+            'Vines have not been fully tested on Python >= 3.8 and might produce wrong results.'
+        )
 
         self.random_state = validate_random_state(random_state)
         self.vine_type = vine_type

pyproject.toml

@@ -8,7 +8,6 @@ classifiers = [
     'License :: Free for non-commercial use',
     'Natural Language :: English',
     'Programming Language :: Python :: 3',
-    'Programming Language :: Python :: 3.8',
     'Programming Language :: Python :: 3.9',
     'Programming Language :: Python :: 3.10',
     'Programming Language :: Python :: 3.11',
@@ -19,7 +18,7 @@ classifiers = [
 keywords = [ 'copulas' ]
 dynamic = ["version"]
 license = { text = 'BSL-1.1' }
-requires-python = '>=3.8,<3.14'
+requires-python = '>=3.9,<3.14'
 readme = 'README.md'
 dependencies = [
     "numpy>=1.21.0;python_version<'3.10'",