SCIPwriteMIP

Author: Joao-Dionisio

src/pyscipopt/scip.pxd

@@ -699,6 +699,7 @@ cdef extern from "scip/scip.h":
     SCIP_RETCODE SCIPwriteOrigProblem(SCIP* scip, char* filename, char* extension, SCIP_Bool genericnames)
     SCIP_RETCODE SCIPwriteTransProblem(SCIP* scip, char* filename, char* extension, SCIP_Bool genericnames)
     SCIP_RETCODE SCIPwriteLP(SCIP* scip, const char*)
+    SCIP_RETCODE SCIPwriteMIP(SCIP * scip, const char * filename, SCIP_Bool genericnames, SCIP_Bool origobj, SCIP_Bool lazyconss)
     SCIP_STATUS SCIPgetStatus(SCIP* scip)
     SCIP_Real SCIPepsilon(SCIP* scip)
     SCIP_Real SCIPfeastol(SCIP* scip)

src/pyscipopt/scip.pxi

@@ -9392,6 +9392,29 @@ cdef class Model:
         PY_SCIP_CALL( SCIPwriteLP(self._scip, absfile) )
 
         locale.setlocale(locale.LC_NUMERIC,user_locale)
+    
+    def writeMIP(self, filename, genericnames=False, origobj=False, lazyconss=False):
+        """
+        Writes MIP relaxation of the current branch-and-bound node to a file
+
+        Parameters
+        ----------
+        filename : str
+            name of the output file
+        genericnames : bool, optional
+            should generic names like x_i and row_j be used in order to avoid troubles with reserved symbols? (Default value = False)
+        origobj : bool, optional
+            should the original objective function be used (Default value = False)
+        lazyconss : bool, optional
+            output removable rows as lazy constraints? (Default value = False)
+        """
+        user_locale = locale.getlocale(category=locale.LC_NUMERIC)
+        locale.setlocale(locale.LC_NUMERIC, "C")
+
+        absfile = str_conversion(abspath(filename))
+        PY_SCIP_CALL(SCIPwriteMIP(self._scip, absfile, genericnames, origobj, lazyconss))
+
+        locale.setlocale(locale.LC_NUMERIC,user_locale)
 
     def createSol(self, Heur heur = None, initlp=False):
         """