check python version out of install_requires option from setup

setup.py

@@ -1,6 +1,11 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 
+# Check python version - it is not possible to specify which Python version to use in the setup.py file
+import sys
+if sys.version_info < (3,9):
+ sys.exit('Sorry, Python >= 3.9 is required')
+
 from setuptools import setup, find_packages
 
 # access the version wihtout importing the EMBLmyGFF3 package
@@ -19,7 +24,7 @@
  license='GPL-3.0',
  packages=find_packages(),
 
- install_requires=['biopython>=1.78', 'bcbio-gff>=0.6.4','numpy>=1.22', 'python_version>="3.8.0"' ],
+ install_requires=['biopython>=1.78', 'bcbio-gff>=0.6.4','numpy>=1.22'],
  include_package_data=True,
 
  entry_points={