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fix to gurobi detection, thanks to @Crissal1995
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Former-commit-id: 8c5505b [formerly 9b09858]
Former-commit-id: 965976d
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@h-g-s
h-g-s committed Jun 18, 2019
1 parent 3f1d56a commit 0d0d890
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4 changes: 2 additions & 2 deletions docs/bench.rst
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Expand Up @@ -9,7 +9,7 @@ the default Gurobi :sup:`®` Python interface, which currently only supports the
Python interpreter CPython. Pulp supports both CPython and also the
just-in-time compiler Pypy. MIP also suports both. JuMP :cite:`DHL17` is the
Mathematical Programming package of the Julia programming language. Both
Jump and Pulp use intermediate date structures to store the mathematical
Jump and Pulp use intermediate data structures to store the mathematical
programming model before flushing it to the solver, so that the selected
solver does not impacts on the model creation times. MIP does not stores
the model itself, directly calling problem creation/modification routines
Expand All @@ -25,7 +25,7 @@ the CBC C Interface. Our computational results already consider this
updated CBC version.

Computational experiments executed on a ThinkPad :sup:`®` X1 notebook with
an Intel :sup:`®` Core™ i7-7600U processor and 8 Gb of RAM using the
an Intel :sup:`®` Core™ i7-7600U processor and 8 Gb of RAM using the
Linux operating system. The following software releases were used: CPython
3.7.3, Pypy 7.1.1, Julia 1.1.1, JuMP 0.19 and Gurobi 8.1 and CBC svn 2563.

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2 changes: 1 addition & 1 deletion mip/constants.py
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Expand Up @@ -2,7 +2,7 @@

from enum import Enum

VERSION = '1.3.0'
VERSION = '1.3.1'

# epsilon number (practical zero)
EPS = 10e-6
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270 changes: 134 additions & 136 deletions mip/gurobi.py
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Expand Up @@ -31,195 +31,193 @@
grblib = ffi.dlopen(lib_path)
print('gurobi version {}.{} found'.format(major_ver,
minor_ver))
has_gurobi = True
except Exception:
has_gurobi = False
raise ImportError


if has_gurobi:
CData = ffi.CData
os_is_64_bit = maxsize > 2**32
INF = float('inf')
MAX_NAME_SIZE = 512 # for variables and constraints
CData = ffi.CData
os_is_64_bit = maxsize > 2**32
INF = float('inf')
MAX_NAME_SIZE = 512 # for variables and constraints

ffi.cdef("""
typedef struct _GRBmodel GRBmodel;
typedef struct _GRBenv GRBenv;
ffi.cdef("""
typedef struct _GRBmodel GRBmodel;
typedef struct _GRBenv GRBenv;
typedef int(*gurobi_callback)(GRBmodel *model, void *cbdata,
int where, void *usrdata);
typedef int(*gurobi_callback)(GRBmodel *model, void *cbdata,
int where, void *usrdata);
GRBenv *GRBgetenv(GRBmodel *model);
GRBenv *GRBgetenv(GRBmodel *model);
int GRBloadenv(GRBenv **envP, const char *logfilename);
int GRBloadenv(GRBenv **envP, const char *logfilename);
int GRBnewmodel(GRBenv *env, GRBmodel **modelP,
const char *Pname, int numvars,
double *obj, double *lb, double *ub, char *vtype,
char **varnames);
int GRBnewmodel(GRBenv *env, GRBmodel **modelP,
const char *Pname, int numvars,
double *obj, double *lb, double *ub, char *vtype,
char **varnames);
void GRBfreeenv(GRBenv *env);
void GRBfreeenv(GRBenv *env);
int GRBfreemodel(GRBmodel *model);
int GRBfreemodel(GRBmodel *model);
int GRBgetintattr(GRBmodel *model, const char *attrname, int *valueP);
int GRBgetintattr(GRBmodel *model, const char *attrname, int *valueP);
int GRBsetintattr(GRBmodel *model, const char *attrname, int newvalue);
int GRBsetintattr(GRBmodel *model, const char *attrname, int newvalue);
int GRBgetintattrelement(GRBmodel *model, const char *attrname,
int element, int *valueP);
int GRBgetintattrelement(GRBmodel *model, const char *attrname,
int element, int *valueP);
int GRBsetintattrelement(GRBmodel *model, const char *attrname,
int element, int newvalue);
int GRBsetintattrelement(GRBmodel *model, const char *attrname,
int element, int newvalue);
int GRBgetdblattr(GRBmodel *model, const char *attrname,
double *valueP);
int GRBgetdblattr(GRBmodel *model, const char *attrname,
double *valueP);
int GRBsetdblattr(GRBmodel *model, const char *attrname,
double newvalue);
int GRBsetdblattr(GRBmodel *model, const char *attrname,
double newvalue);
int GRBgetdblattrarray(GRBmodel *model, const char *attrname,
int first, int len, double *values);
int GRBgetdblattrarray(GRBmodel *model, const char *attrname,
int first, int len, double *values);
int GRBsetdblattrarray(GRBmodel *model, const char *attrname,
int first, int len, double *newvalues);
int GRBsetdblattrarray(GRBmodel *model, const char *attrname,
int first, int len, double *newvalues);
int GRBsetdblattrlist(GRBmodel *model, const char *attrname,
int len, int *ind, double *newvalues);
int GRBsetdblattrlist(GRBmodel *model, const char *attrname,
int len, int *ind, double *newvalues);
int GRBgetdblattrelement(GRBmodel *model, const char *attrname,
int element, double *valueP);
int GRBgetdblattrelement(GRBmodel *model, const char *attrname,
int element, double *valueP);
int GRBsetdblattrelement(GRBmodel *model, const char *attrname,
int element, double newvalue);
int GRBsetdblattrelement(GRBmodel *model, const char *attrname,
int element, double newvalue);
int GRBgetcharattrarray(GRBmodel *model, const char *attrname,
int first, int len, char *values);
int GRBgetcharattrarray(GRBmodel *model, const char *attrname,
int first, int len, char *values);
int GRBsetcharattrarray(GRBmodel *model, const char *attrname,
int first, int len, char *newvalues);
int GRBsetcharattrarray(GRBmodel *model, const char *attrname,
int first, int len, char *newvalues);
int GRBgetcharattrelement(GRBmodel *model, const char *attrname,
int element, char *valueP);
int GRBsetcharattrelement(GRBmodel *model, const char *attrname,
int element, char newvalue);
int GRBgetcharattrelement(GRBmodel *model, const char *attrname,
int element, char *valueP);
int GRBsetcharattrelement(GRBmodel *model, const char *attrname,
int element, char newvalue);
int GRBgetstrattrelement(GRBmodel *model, const char *attrname,
int element, char **valueP);
int GRBgetstrattrelement(GRBmodel *model, const char *attrname,
int element, char **valueP);
int GRBgetstrattr (GRBmodel *model, const char *attrname,
char **valueP);
int GRBgetstrattr (GRBmodel *model, const char *attrname,
char **valueP);
int GRBsetstrattr (GRBmodel *model, const char *attrname,
const char *newvalue);
int GRBsetstrattr (GRBmodel *model, const char *attrname,
const char *newvalue);
int GRBgetintparam(GRBenv *env, const char *paramname, int *valueP);
int GRBgetintparam(GRBenv *env, const char *paramname, int *valueP);
int GRBsetintparam(GRBenv *env, const char *paramname, int value);
int GRBsetintparam(GRBenv *env, const char *paramname, int value);
int GRBgetdblparam(GRBenv *env, const char *paramname, double *valueP);
int GRBgetdblparam(GRBenv *env, const char *paramname, double *valueP);
int GRBsetdblparam(GRBenv *env, const char *paramname, double value);
int GRBsetdblparam(GRBenv *env, const char *paramname, double value);
int GRBsetobjectiven(GRBmodel *model, int index,
int priority, double weight,
double abstol, double reltol, const char *name,
double constant, int lnz, int *lind, double *lval);
int GRBsetobjectiven(GRBmodel *model, int index,
int priority, double weight,
double abstol, double reltol, const char *name,
double constant, int lnz, int *lind, double *lval);
int GRBaddvar(GRBmodel *model, int numnz, int *vind, double *vval,
double obj, double lb, double ub, char vtype,
const char *varname);
int GRBaddvar(GRBmodel *model, int numnz, int *vind, double *vval,
double obj, double lb, double ub, char vtype,
const char *varname);
int GRBaddconstr(GRBmodel *model, int numnz, int *cind, double *cval,
char sense, double rhs, const char *constrname);
int GRBaddconstr(GRBmodel *model, int numnz, int *cind, double *cval,
char sense, double rhs, const char *constrname);
int GRBgetconstrs(GRBmodel *model, int *numnzP, int *cbeg,
int *cind, double *cval, int start, int len);
int GRBgetconstrs(GRBmodel *model, int *numnzP, int *cbeg,
int *cind, double *cval, int start, int len);
int GRBgetvars(GRBmodel *model, int *numnzP, int *vbeg, int *vind,
double *vval, int start, int len);
int GRBgetvars(GRBmodel *model, int *numnzP, int *vbeg, int *vind,
double *vval, int start, int len);
int GRBgetvarbyname(GRBmodel *model, const char *name, int *indexP);
int GRBgetvarbyname(GRBmodel *model, const char *name, int *indexP);
int GRBgetconstrbyname(GRBmodel *model, const char *name, int *indexP);
int GRBgetconstrbyname(GRBmodel *model, const char *name, int *indexP);
int GRBoptimize(GRBmodel *model);
int GRBoptimize(GRBmodel *model);
int GRBupdatemodel(GRBmodel *model);
int GRBupdatemodel(GRBmodel *model);
int GRBwrite(GRBmodel *model, const char *filename);
int GRBwrite(GRBmodel *model, const char *filename);
int GRBreadmodel(GRBenv *env, const char *filename, GRBmodel **modelP);
int GRBreadmodel(GRBenv *env, const char *filename, GRBmodel **modelP);
int GRBdelvars(GRBmodel *model, int numdel, int *ind );
int GRBdelvars(GRBmodel *model, int numdel, int *ind );
int GRBsetcharattrlist(GRBmodel *model, const char *attrname,
int len, int *ind, char *newvalues);
int GRBsetcharattrlist(GRBmodel *model, const char *attrname,
int len, int *ind, char *newvalues);
int GRBsetcallbackfunc(GRBmodel *model,
gurobi_callback grbcb,
void *usrdata);
int GRBsetcallbackfunc(GRBmodel *model,
gurobi_callback grbcb,
void *usrdata);
int GRBcbget(void *cbdata, int where, int what, void *resultP);
int GRBcbget(void *cbdata, int where, int what, void *resultP);
int GRBcbsetparam(void *cbdata, const char *paramname,
const char *newvalue);
int GRBcbsetparam(void *cbdata, const char *paramname,
const char *newvalue);
int GRBcbsolution(void *cbdata, const double *solution,
double *objvalP);
int GRBcbsolution(void *cbdata, const double *solution,
double *objvalP);
int GRBcbcut(void *cbdata, int cutlen, const int *cutind,
const double *cutval,
char cutsense, double cutrhs);
int GRBcbcut(void *cbdata, int cutlen, const int *cutind,
const double *cutval,
char cutsense, double cutrhs);
int GRBcblazy(void *cbdata, int lazylen, const int *lazyind,
const double *lazyval, char lazysense, double lazyrhs);
int GRBcblazy(void *cbdata, int lazylen, const int *lazyind,
const double *lazyval, char lazysense, double lazyrhs);
int GRBdelconstrs (GRBmodel *model, int numdel, int *ind);
""")
int GRBdelconstrs (GRBmodel *model, int numdel, int *ind);
""")

GRBloadenv = grblib.GRBloadenv
GRBnewmodel = grblib.GRBnewmodel
GRBfreeenv = grblib.GRBfreeenv
GRBfreemodel = grblib.GRBfreemodel
GRBaddvar = grblib.GRBaddvar
GRBaddconstr = grblib.GRBaddconstr
GRBoptimize = grblib.GRBoptimize
GRBgetvarbyname = grblib.GRBgetvarbyname
GRBsetdblattrarray = grblib.GRBsetdblattrarray
GRBsetcharattrlist = grblib.GRBsetcharattrlist
GRBsetdblattrlist = grblib.GRBsetdblattrlist
GRBwrite = grblib.GRBwrite
GRBreadmodel = grblib.GRBreadmodel
GRBgetconstrbyname = grblib.GRBgetconstrbyname
GRBupdatemodel = grblib.GRBupdatemodel
GRBgetcharattrelement = grblib.GRBgetcharattrelement
GRBgetconstrs = grblib.GRBgetconstrs
GRBgetdblattrelement = grblib.GRBgetdblattrelement
GRBgetvars = grblib.GRBgetvars
GRBsetcharattrelement = grblib.GRBsetcharattrelement
GRBsetdblattrelement = grblib.GRBsetdblattrelement
GRBsetintattr = grblib.GRBsetintattr
GRBsetdblattr = grblib.GRBsetdblattr
GRBgetintattr = grblib.GRBgetintattr
GRBgetintparam = grblib.GRBgetintparam
GRBsetintparam = grblib.GRBsetintparam
GRBgetdblattr = grblib.GRBgetdblattr
GRBsetdblparam = grblib.GRBsetdblparam
GRBgetdblparam = grblib.GRBgetdblparam
GRBgetstrattrelement = grblib.GRBgetstrattrelement
GRBcbget = grblib.GRBcbget
GRBcbsetparam = grblib.GRBcbsetparam
GRBcbsolution = grblib.GRBcbsolution
GRBcbcut = grblib.GRBcbcut
GRBcblazy = grblib.GRBcblazy
GRBsetcallbackfunc = grblib.GRBsetcallbackfunc
GRBdelvars = grblib.GRBdelvars
GRBdelconstrs = grblib.GRBdelconstrs
GRBgetenv = grblib.GRBgetenv
GRBgetstrattr = grblib.GRBgetstrattr
GRBsetstrattr = grblib.GRBsetstrattr
GRBloadenv = grblib.GRBloadenv
GRBnewmodel = grblib.GRBnewmodel
GRBfreeenv = grblib.GRBfreeenv
GRBfreemodel = grblib.GRBfreemodel
GRBaddvar = grblib.GRBaddvar
GRBaddconstr = grblib.GRBaddconstr
GRBoptimize = grblib.GRBoptimize
GRBgetvarbyname = grblib.GRBgetvarbyname
GRBsetdblattrarray = grblib.GRBsetdblattrarray
GRBsetcharattrlist = grblib.GRBsetcharattrlist
GRBsetdblattrlist = grblib.GRBsetdblattrlist
GRBwrite = grblib.GRBwrite
GRBreadmodel = grblib.GRBreadmodel
GRBgetconstrbyname = grblib.GRBgetconstrbyname
GRBupdatemodel = grblib.GRBupdatemodel
GRBgetcharattrelement = grblib.GRBgetcharattrelement
GRBgetconstrs = grblib.GRBgetconstrs
GRBgetdblattrelement = grblib.GRBgetdblattrelement
GRBgetvars = grblib.GRBgetvars
GRBsetcharattrelement = grblib.GRBsetcharattrelement
GRBsetdblattrelement = grblib.GRBsetdblattrelement
GRBsetintattr = grblib.GRBsetintattr
GRBsetdblattr = grblib.GRBsetdblattr
GRBgetintattr = grblib.GRBgetintattr
GRBgetintparam = grblib.GRBgetintparam
GRBsetintparam = grblib.GRBsetintparam
GRBgetdblattr = grblib.GRBgetdblattr
GRBsetdblparam = grblib.GRBsetdblparam
GRBgetdblparam = grblib.GRBgetdblparam
GRBgetstrattrelement = grblib.GRBgetstrattrelement
GRBcbget = grblib.GRBcbget
GRBcbsetparam = grblib.GRBcbsetparam
GRBcbsolution = grblib.GRBcbsolution
GRBcbcut = grblib.GRBcbcut
GRBcblazy = grblib.GRBcblazy
GRBsetcallbackfunc = grblib.GRBsetcallbackfunc
GRBdelvars = grblib.GRBdelvars
GRBdelconstrs = grblib.GRBdelconstrs
GRBgetenv = grblib.GRBgetenv
GRBgetstrattr = grblib.GRBgetstrattr
GRBsetstrattr = grblib.GRBsetstrattr


GRB_CB_PRE_COLDEL = 1000
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9 changes: 7 additions & 2 deletions mip/model.py
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Expand Up @@ -482,8 +482,13 @@ def __init__(self, name: str = "",
self.solver = SolverCbc(self, name, sense)
else:
# checking which solvers are available
from mip import gurobi
if gurobi.has_gurobi:
try:
from mip.gurobi import SolverGurobi
has_gurobi = True
except ImportError:
has_gurobi = False

if has_gurobi:
from mip.gurobi import SolverGurobi
self.solver = SolverGurobi(self, name, sense)
self.solver_name = GUROBI
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