Fixed segmentation faults from doctests under Python 3.10 (#2994)

* ignore *opengl* glob for module doctests again

* removed custom pytest_report_header, fixes testing submodules (????)

* restore previous version of conftest, with segfault fix

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* handle situation of non-available readline

* Update conftest.py

Co-authored-by: Naveen M K <naveen521kk@gmail.com>

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Naveen M K <naveen521kk@gmail.com>

.github/workflows/ci.yml

@@ -201,7 +201,7 @@ jobs:
 
       - name: Run module doctests
         run: |
-          poetry run python -m pytest -v --cov-append --doctest-modules manim
+          poetry run python -m pytest -v --cov-append --ignore-glob="*opengl*" --doctest-modules manim
 
       - name: Run doctests in rst files
         run: |

conftest.py

@@ -5,6 +5,12 @@
 
 from __future__ import annotations
 
+try:
+    # https://github.com/moderngl/moderngl/issues/517
+    import readline  # required to prevent a segfault on Python 3.10
+except ModuleNotFoundError:  # windows
+    pass
+
 import moderngl
 
 # If it is running Doctest the current directory
@@ -30,10 +36,12 @@ def temp_media_dir(tmpdir, monkeypatch, request):
 
 def pytest_report_header(config):
     ctx = moderngl.create_standalone_context()
+    info = ctx.info
+    ctx.release()
     return (
-        "\nOpenGL Information",
+        "\nOpenGL information",
         "------------------",
-        f"vendor: {ctx.info['GL_VENDOR'].strip()}",
-        f"renderer: {ctx.info['GL_RENDERER'].strip()}",
-        f"version: {ctx.info['GL_VERSION'].strip()}\n",
+        f"vendor: {info['GL_VENDOR'].strip()}",
+        f"renderer: {info['GL_RENDERER'].strip()}",
+        f"version: {info['GL_VERSION'].strip()}\n",
     )