Add SCIP Persistent Support

.github/workflows/test_branches.yml

@@ -292,6 +292,12 @@ jobs:
                 || echo "WARNING: Xpress Community Edition is not available"
             python -m pip install --cache-dir cache/pip maingopy \
                 || echo "WARNING: MAiNGO is not available"
+            if [[ ${{matrix.python}} == pypy* ]]; then
+                echo "skipping SCIP for pypy"
+            else
+                python -m pip install --cache-dir cache/pip pyscipopt \
+                    || echo "WARNING: SCIP is not available"
+            fi
             if [[ ${{matrix.python}} == pypy* ]]; then
                 echo "skipping wntr for pypy"
             else
@@ -373,7 +379,7 @@ jobs:
         if test -z "${{matrix.slim}}"; then
             PYVER=$(echo "py${{matrix.python}}" | sed 's/\.//g')
             echo "Installing for $PYVER"
-            for PKG in 'cplex>=12.10' docplex gurobi xpress cyipopt pymumps scip; do
+            for PKG in 'cplex>=12.10' docplex gurobi xpress cyipopt pymumps scip pyscipopt; do
                 echo ""
                 echo "*** Install $PKG ***"
                 # conda can literally take an hour to determine that a

.github/workflows/test_pr_and_main.yml

@@ -324,6 +324,12 @@ jobs:
                 || echo "WARNING: Xpress Community Edition is not available"
             python -m pip install --cache-dir cache/pip maingopy \
                 || echo "WARNING: MAiNGO is not available"
+            if [[ ${{matrix.python}} == pypy* ]]; then
+                echo "skipping SCIP for pypy"
+            else
+                python -m pip install --cache-dir cache/pip pyscipopt \
+                    || echo "WARNING: SCIP is not available"
+            fi
             if [[ ${{matrix.python}} == pypy* ]]; then
                 echo "skipping wntr for pypy"
             else
@@ -405,7 +411,7 @@ jobs:
         if test -z "${{matrix.slim}}"; then
             PYVER=$(echo "py${{matrix.python}}" | sed 's/\.//g')
             echo "Installing for $PYVER"
-            for PKG in 'cplex>=12.10' docplex gurobi xpress cyipopt pymumps scip; do
+            for PKG in 'cplex>=12.10' docplex gurobi xpress cyipopt pymumps scip pyscipopt; do
                 echo ""
                 echo "*** Install $PKG ***"
                 # conda can literally take an hour to determine that a

doc/OnlineDocs/reference/topical/solvers/index.rst

@@ -9,3 +9,4 @@ Solver Interfaces
    gurobi_direct.rst
    gurobi_persistent.rst
    xpress_persistent.rst
+   scip_persistent.rst

doc/OnlineDocs/reference/topical/solvers/scip_persistent.rst

@@ -0,0 +1,7 @@
+SCIPPersistent
+================
+
+.. autoclass:: pyomo.solvers.plugins.solvers.scip_persistent.SCIPPersistent
+   :members:
+   :inherited-members:
+   :show-inheritance:

pyomo/solvers/plugins/solvers/__init__.py

@@ -31,5 +31,7 @@
     mosek_persistent,
     xpress_direct,
     xpress_persistent,
+    scip_direct,
+    scip_persistent,
     SAS,
 )