Nullptr revert (#145)

* cis: do not build wheels on 3.11 yet (betas are not ABI stable)

Alos update to setup-pythonv4

* Revert use of nullptr in PyTuple_SET_ITEM

This reverts commit 4a568b7fb6ef9996181013b960a18ceec56d8889, reversing
changes made to 13b6186.

* cis: force to use 3.11beta4 and update checkout action

* fix typo

.github/workflows/ci.yml

@@ -24,13 +24,13 @@ jobs:
       matrix:
         python-version: ['3.9']
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Get history and tags for SCM versioning to work
         run: |
           git fetch --prune --unshallow
           git fetch --depth=1 origin +refs/tags/*:refs/tags/*
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies
@@ -63,7 +63,7 @@ jobs:
       matrix:
         os: [ubuntu-latest]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Install dependencies
         run: |
           sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test
@@ -83,13 +83,13 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
         python-version: ['3.7', '3.8', '3.9', '3.10', 'pypy-3.7', 'pypy-3.8', '3.11.0-beta - 3.11.0']
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - name: Get history and tags for SCM versioning to work
         run: |
           git fetch --prune --unshallow
           git fetch --depth=1 origin +refs/tags/*:refs/tags/*
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: ${{ matrix.python-version }}
       - name: Install dependencies

.github/workflows/docs.yml

@@ -27,7 +27,9 @@ jobs:
           git fetch --prune --unshallow
           git fetch --depth=1 origin +refs/tags/*:refs/tags/*
       - name: Set up Python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
+        with:
+          python-version: '3.x'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip

.github/workflows/release.yml

@@ -19,9 +19,9 @@ jobs:
           git fetch --prune --unshallow
           git fetch --depth=1 origin +refs/tags/*:refs/tags/*
       - name: Setup Python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
-          python-version: '3.10'
+          python-version: '3.x'
       - name: Build sdist
         run: |
           pip install --upgrade pip
@@ -77,9 +77,9 @@ jobs:
           git fetch --prune --unshallow
           git fetch --depth=1 origin +refs/tags/*:refs/tags/*
       - name: Setup Python
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
-          python-version: '3.9'
+          python-version: '3.x'
       - name: Set up QEMU
         if: runner.os == 'Linux' && matrix.archs != 'auto'
         uses: docker/setup-qemu-action@v1
@@ -102,7 +102,7 @@ jobs:
         uses: pypa/[email protected]
         if: matrix.manylinux_version == 'manylinux2010'
         env:
-          CIBW_BUILD: "cp39-* cp310-* cp311-* pp37-*"
+          CIBW_BUILD: "cp39-* cp310-* pp37-*"
           CIBW_ARCHS_MACOS: x86_64 universal2 arm64
           CIBW_ARCHS_LINUX: ${{ matrix.archs }}
           CIBW_MANYLINUX_X86_64_IMAGE: manylinux2010

py/src/symbolics.h

@@ -123,7 +123,7 @@ PyObject* BinaryMul::operator()( Expression* first, double second )
 		return 0;
 	Py_ssize_t end = PyTuple_GET_SIZE( first->terms );
 	for( Py_ssize_t i = 0; i < end; ++i )  // memset 0 for safe error return
-		PyTuple_SET_ITEM( terms.get(), i, nullptr );
+		PyTuple_SET_ITEM( terms.get(), i, 0 );
 	for( Py_ssize_t i = 0; i < end; ++i )
 	{
 		PyObject* item = PyTuple_GET_ITEM( first->terms, i );

py/src/util.h

@@ -117,7 +117,7 @@ make_terms( const std::map<PyObject*, double>& coeffs )
         return 0;
     Py_ssize_t size = PyTuple_GET_SIZE( terms.get() );
     for( Py_ssize_t i = 0; i < size; ++i ) // zero tuple for safe early return
-        PyTuple_SET_ITEM( terms.get(), i, nullptr );
+        PyTuple_SET_ITEM( terms.get(), i, 0 );
     Py_ssize_t i = 0;
     iter_t it = coeffs.begin();
     iter_t end = coeffs.end();