enablepricing default set to True (#1137)

* enablepricing default set to True

* mini test

Author: Joao-Dionisio

CHANGELOG.md

@@ -5,6 +5,7 @@
 ### Fixed
 - all fundamental callbacks now raise an error if not implemented
 ### Changed
+- changed default value of enablepricing flag to True
 ### Removed
 
 ## 6.0.0 - 2025.xx.yy

src/pyscipopt/scip.pxi

@@ -2780,7 +2780,7 @@ cdef class IIS:
 ##
 cdef class Model:
 
-    def __init__(self, problemName='model', defaultPlugins=True, Model sourceModel=None, origcopy=False, globalcopy=True, enablepricing=False, createscip=True, threadsafe=False):
+    def __init__(self, problemName='model', defaultPlugins=True, Model sourceModel=None, origcopy=False, globalcopy=True, enablepricing=True, createscip=True, threadsafe=False):
         """
         Main class holding a pointer to SCIP for managing most interactions
 
@@ -2797,7 +2797,7 @@ cdef class Model:
         globalcopy : bool, optional
             whether to create a global or a local copy (default True)
         enablepricing : bool, optional
-            whether to enable pricing in copy (default False)
+            whether to enable pricing in copy (default True)
         createscip : bool, optional
             initialize the Model object and creates a SCIP instance (default True)
         threadsafe : bool, optional

tests/test_copy.py

@@ -10,7 +10,7 @@ def test_copy():
     y = s.addVar("y", vtype = 'C', obj = 2.0)
     s.setObjective(4.0 * y, clear = False)
 
-    c = s.addCons(x + 2 * y >= 1.0)
+    c = s.addCons(x + 2 * y >= 1.0, modifiable = True)
 
     s2 = Model(sourceModel=s)
 
@@ -19,4 +19,5 @@ def test_copy():
     s2.optimize()
 
     assert s.getObjVal() == s2.getObjVal()
+    assert s.getConss()[0].isModifiable() and s2.getConss()[0].isModifiable()