Python 3.12: partially switching from pkg_resources to packaging

python/pari.py

@@ -3,7 +3,8 @@
 while supporting both old and new versions of cypari and sage.pari and
 accounting for all of the various idiosyncrasies.
 """
-from pkg_resources import parse_version
+
+from packaging.version import parse as parse_version
 from .sage_helper import _within_sage
 
 if _within_sage:

python/phone_home.py

@@ -1,7 +1,8 @@
 import sys
 from threading import Thread
 from .version import version as current
-from pkg_resources import parse_version
+from packaging.version import parse as parse_version
+
 import ssl
 from urllib import request
 version_url = 'http://snappy.computop.org/current.txt'

setup.py

@@ -19,10 +19,10 @@
 """
 
 no_sphinx_message = """
-You need to have Sphinx (>= 1.7) installed to rebuild the
+You need to have Sphinx installed to rebuild the
 documentation for snappy module, e.g.
 
-  sudo python -m pip install "sphinx>=1.7"
+  sudo python -m pip install sphinx
 
 """
 
@@ -38,13 +38,8 @@
 
 try:
     import setuptools
-    import pkg_resources
 except ImportError:
     raise ImportError(no_setuptools_message)
-try:
-    pkg_resources.working_set.require('setuptools>=1.0')
-except (pkg_resources.DistributionNotFound, pkg_resources.VersionConflict):
-    raise ImportError(old_setuptools_message)
 
 import os, platform, shutil, site, subprocess, sys, sysconfig, re
 from os.path import getmtime, exists
@@ -108,8 +103,8 @@ def run(self):
         if not os.path.exists('doc_src'):
             return # Are in an sdist and may not have sphinx
         try:
-            pkg_resources.working_set.require('sphinx>=1.7')
-        except (pkg_resources.DistributionNotFound, pkg_resources.VersionConflict):
+            import sphinx
+        except ImportError
             raise ImportError(no_sphinx_message)
         sphinx_cmd = load_entry_point('sphinx>=1.7', 'console_scripts', 'sphinx-build')
         sphinx_args = ['-a', '-E', '-d', 'doc_src/_build/doctrees',
@@ -498,8 +493,8 @@ def add(self, source_file, dependency_mod_time=0.0):
 ext_modules = [SnapPyC, SnapPyHP, TwisterCore]
 
 install_requires = ['plink>=2.4.2', 'spherogram>=2.2', 'FXrays>=1.3',
-                    'pypng', 'decorator', 'snappy_manifolds>=1.2',
-                    'low_index>=1.2']
+                    'snappy_manifolds>=1.2', 'low_index>=1.2',
+                    'pypng', 'decorator', 'packaging']
 try:
     import sage
 except ImportError: