How to use new_tmp_file method in localstack

Best Python code snippet using localstack_python

vpsolver.py

Source:vpsolver.py

...34    """35    Wrapper for .vbp files.36    """37    def __init__(self, W, w, b, binary=False, vtype="I", verbose=False):38        self.vbp_file = VPSolver.new_tmp_file(".vbp")39        with open(self.vbp_file, "w") as fdst:40            print(len(W), file=fdst)  # ndims41            print(" ".join(map(str, W)), file=fdst)  # W42            print(len(w), file=fdst)  # m43            for i in range(len(w)):  # items44                row = list(w[i])+[b[i]]45                assert len(row) == len(W)+146                print(" ".join(map(str, row)), file=fdst)47            print("BINARY{{{:d}}};".format(binary), file=fdst)48            print("VTYPE{{{}}};".format(vtype), file=fdst)49        if verbose:50            print(utils.get_content(self.vbp_file))51        self.m = len(b)52        self.ndims = len(W)53        self.binary = binary54        self.vtype = vtype55        self.W, self.w, self.b = W, w, b56        self.labels = list(range(self.m))57    @classmethod58    def from_str(cls, content, verbose=False):59        lst = utils.get_instance_data(content)60        ndims = lst.pop(0)61        W = lst[:ndims]62        lst = lst[ndims:]63        m = lst.pop(0)64        w, b = [], []65        for i in range(m):66            w.append(lst[:ndims])67            lst = lst[ndims:]68            b.append(lst.pop(0))69        assert lst == []70        binary = bool(int(utils.get_opt("BINARY", content, False)))71        vtype = utils.get_opt("VTYPE", content, "I")72        return cls(W, w, b, binary, vtype, verbose)73    @classmethod74    def from_file(cls, vbp_file, verbose=False):75        return cls.from_str(utils.get_content(vbp_file), verbose=verbose)76    @property77    def filename(self):78        """Return the filename."""79        return self.vbp_file80    def weights(self):81        """Return the item weights."""82        return {i: tuple(self.w[i]) for i in range(self.m)}83    def capacities(self):84        """Return the bin capacities."""85        return [tuple(self.W)]86    def __del__(self):87        try:88            os.remove(self.vbp_file)89        except:90            pass91class MVP(object):92    """93    Wrapper for .mvp files.94    """95    def __init__(96            self, Ws, Cs, Qs, ws, b, binary=False, vtype="I", verbose=False):97        self.mvp_file = VPSolver.new_tmp_file(".mvp")98        with open(self.mvp_file, "w") as fdst:99            ndims = len(Ws[0])100            print(ndims, file=fdst)  # ndims101            print(len(Ws), file=fdst)  # nbtypes102            assert len(Ws) == len(Cs)103            assert len(Ws) == len(Qs)104            for Wi, Ci, Qi in zip(Ws, Cs, Qs):  # Ws, Cs, Qs105                assert len(Wi) == ndims106                if Qi == utils.inf:107                    Qi = -1108                print(" ".join(map(str, list(Wi)+[Ci]+[Qi])), file=fdst)109            assert len(ws) == len(b)110            print(len(ws), file=fdst)  # m111            for i in range(len(ws)):  # items112                print("{} {}".format(len(ws[i]), b[i]), file=fdst)113                for j, w in enumerate(ws[i]):114                    assert len(w) == ndims115                    print(" ".join(map(str, w)), file=fdst)116            print("BINARY{{{:d}}};".format(binary), file=fdst)117            print("VTYPE{{{}}};".format(vtype), file=fdst)118        if verbose:119            print(utils.get_content(self.mvp_file))120        self.m = len(b)121        self.ndims = ndims122        self.binary = binary123        self.vtype = vtype124        self.Ws, self.Cs, self.Qs = Ws, Cs, Qs125        self.ws, self.b = ws, b126        self.labels = [127            (i, j)128            for i in range(len(self.ws))129            for j in range(len(self.ws[i]))130        ]131    @classmethod132    def from_str(cls, content, verbose=False):133        lst = utils.get_instance_data(content)134        ndims = lst.pop(0)135        nbtypes = lst.pop(0)136        Ws, Cs, Qs = [], [], []137        for i in range(nbtypes):138            Ws.append(lst[:ndims])139            lst = lst[ndims:]140            Cs.append(lst.pop(0))141            Qs.append(lst.pop(0))142        m = lst.pop(0)143        ws, b = [], []144        for i in range(m):145            ws.append([])146            qi = lst.pop(0)147            bi = lst.pop(0)148            b.append(bi)149            for j in range(qi):150                ws[i].append(lst[:ndims])151                lst = lst[ndims:]152        assert lst == []153        binary = bool(int(utils.get_opt("BINARY", content, False)))154        vtype = utils.get_opt("VTYPE", content, "I")155        return cls(Ws, Cs, Qs, ws, b, binary, vtype, verbose)156    @classmethod157    def from_file(cls, mvp_file, verbose=False):158        return cls.from_str(utils.get_content(mvp_file), verbose=verbose)159    @property160    def filename(self):161        """Return the filename."""162        return self.mvp_file163    def weights(self):164        """Return the item weights."""165        return {166            (i, j): tuple(self.ws[i][j])167            for i in range(len(self.ws))168            for j in range(len(self.ws[i]))169        }170    def capacities(self):171        """Return the bin capacities."""172        return list(map(tuple, self.Ws))173    def __del__(self):174        try:175            os.remove(self.mvp_file)176        except:177            pass178class AFG(object):179    """180    Wrapper for .afg files.181    """182    def __init__(self, instance, verbose=None):183        if instance is not None:184            assert isinstance(instance, (VBP, MVP))185            self.instance = instance186            self.afg_file = VPSolver.new_tmp_file(".afg")187            self.output = VPSolver.vbp2afg(188                instance, self.filename, verbose=verbose189            )190    @classmethod191    def from_file(cls, afg_file, verbose=None):192        obj = cls(None)193        obj.instance = MVP.from_file(afg_file)194        obj.afg_file = VPSolver.new_tmp_file(".afg")195        shutil.copyfile(afg_file, obj.afg_file)196        return obj197    def graph(self):198        """Return the graph as an AFGraph object."""199        content = utils.get_content(self.filename)200        labels = self.instance.labels201        S = int(utils.get_opt("S", content))202        Ts = list(map(int, utils.get_opt("Ts", content).split(",")))203        arcs = list(map(int, utils.get_opt("ARCS", content).split()))204        LOSS = int(utils.get_opt("LOSS", content))205        V, A = set([]), []206        for i in range(0, len(arcs), 3):207            u, v, i = arcs[i:i+3]208            V.add(u)209            V.add(v)210            A.append((u, v, labels[i] if i != LOSS else LOSS))211        graph = AFGraph(V, A, S, Ts, LOSS)212        lbls = {S: "S"}213        if len(Ts) == 1:214            lbls[Ts[0]] = "T"215        else:216            for t, new in zip(Ts, ["T{}".format(i+1) for i in range(len(Ts))]):217                lbls[t] = new218        graph.relabel(lambda u: lbls.get(u, u))219        return graph220    def draw(self, svg_file, lpaths=False, graph_attrs=None, verbose=False):221        """Draw the arc-flow graph in .svg format."""222        if lpaths:223            weights = self.instance.weights()224            capacities = self.instance.capacities()225        else:226            weights = None227            capacities = None228        self.graph().draw(229            svg_file, weights=weights, capacities=capacities, lpaths=lpaths,230            graph_attrs=graph_attrs, verbose=verbose231        )232    @property233    def filename(self):234        """Return the filename."""235        return self.afg_file236    def __del__(self):237        try:238            os.remove(self.afg_file)239        except:240            pass241class MPS(object):242    """243    Wrapper for .mps files.244    """245    def __init__(self, graph, verbose=None):246        assert isinstance(graph, AFG)247        self.afg_graph = graph248        self.mps_file = VPSolver.new_tmp_file(".mps")249        self.output = VPSolver.afg2mps(250            graph.filename, self.filename, verbose=verbose251        )252    @property253    def filename(self):254        """Return the filename."""255        return self.mps_file256    def __del__(self):257        try:258            os.remove(self.mps_file)259        except:260            pass261class LP(object):262    """263    Wrapper for .lp files.264    """265    def __init__(self, graph, verbose=None):266        assert isinstance(graph, AFG)267        self.afg_graph = graph268        self.lp_file = VPSolver.new_tmp_file(".lp")269        self.output = VPSolver.afg2lp(270            graph.filename, self.filename, verbose=verbose271        )272    @property273    def filename(self):274        """Return the filename."""275        return self.lp_file276    def __del__(self):277        try:278            os.remove(self.lp_file)279        except:280            pass281class VPSolver(object):282    """283    Tools to interact with VPSolver binaries and scripts.284    """285    VPSOLVER_EXEC = "vpsolver"286    VBP2AFG_EXEC = "vbp2afg"287    AFG2MPS_EXEC = "afg2mps"288    AFG2LP_EXEC = "afg2lp"289    VBPSOL_EXEC = "vbpsol"290    TMP_DIR = tempfile.mkdtemp()291    TMP_CNT = 0292    PLIST = []293    VERBOSE = True294    @staticmethod295    def set_verbose(verbose):296        """Enable/disable verbose output."""297        if verbose is not None:298            VPSolver.VERBOSE = verbose299    @staticmethod300    def new_tmp_file(ext="tmp"):301        """Create a temporary file."""302        if not ext.startswith("."):303            ext = ".{}".format(ext)304        fname = "{}/{}{}".format(VPSolver.TMP_DIR, VPSolver.TMP_CNT, ext)305        VPSolver.TMP_CNT += 1306        if not os.path.exists(VPSolver.TMP_DIR):307            os.makedirs(VPSolver.TMP_DIR)308        return fname309    @staticmethod310    @atexit.register311    def clear():312        """Delete temporary files and kills child processes."""313        for p in VPSolver.PLIST:314            try:315                os.killpg(p.pid, signal.SIGTERM)316            except:317                pass318        try:319            shutil.rmtree(VPSolver.TMP_DIR)320        except:321            pass322    @staticmethod323    def log(msg, verbose=None):324        """Log a message."""325        if verbose is None:326            verbose = VPSolver.VERBOSE327        if verbose:328            print(msg)329    @staticmethod330    def run(cmd, tee=None, grep=None, grepv=None, verbose=None):331        """Run a system command."""332        if verbose is None:333            verbose = VPSolver.VERBOSE334        proc = subprocess.Popen(335            cmd, shell=True,336            stdout=subprocess.PIPE,337            stderr=subprocess.STDOUT,338            preexec_fn=os.setsid339        )340        VPSolver.PLIST.append(proc)341        def pipe_output(fin, fout_list, grep=None, grepv=None):342            while True:343                line = fin.readline().decode("utf-8")344                if not line:345                    break346                if grep is not None and grep not in line:347                    continue348                if grepv is not None and grepv in line:349                    continue350                for f in fout_list:351                    if f is sys.stdout and line.startswith("PYSOL="):352                        continue353                    f.write(line)354                    f.flush()355        if tee is None:356            if verbose:357                pipe_output(proc.stdout, [sys.stdout], grep, grepv)358        else:359            with open(tee, "w") as ftee:360                if verbose:361                    pipe_output(proc.stdout, [sys.stdout, ftee], grep, grepv)362                else:363                    pipe_output(proc.stdout, [ftee], grep, grepv)364        exit_code = proc.wait()365        proc.stdout.close()366        if exit_code != 0:367            raise RuntimeError("failed to run '{}'".format(cmd))368    @staticmethod369    def parse_vbpsol(vpsol_output):370        """Transform 'vbpsol' solutions into python data."""371        marker = "PYSOL="372        if marker in vpsol_output:373            vpsol_output = vpsol_output[vpsol_output.find(marker)+len(marker):]374            vpsol_output = vpsol_output[:vpsol_output.find("\n")]375            obj, sol = eval(vpsol_output)376            return obj, sol377        else:378            return None379    @staticmethod380    def vbpsol(afg_file, sol_file, print_inst=False, pyout=True, verbose=None):381        """Call 'vbpsol' to extract a vector packing solution."""382        if isinstance(afg_file, AFG):383            afg_file = afg_file.filename384        out_file = VPSolver.new_tmp_file()385        opts = "{print_inst:d} {pyout:d}".format(386            print_inst=print_inst, pyout=pyout387        )388        VPSolver.run(389            "{} {} {} {}".format(390                VPSolver.VBPSOL_EXEC, afg_file, sol_file, opts391            ),392            tee=out_file,393            verbose=verbose394        )395        output = utils.get_content(out_file)396        os.remove(out_file)397        return VPSolver.parse_vbpsol(output)398    @staticmethod399    def vpsolver(instance_file, print_inst=False, pyout=True, verbose=None):400        """Call 'vpsolver' to solve .vbp instances."""401        if isinstance(instance_file, (VBP, MVP)):402            instance_file = instance_file.filename403        content = utils.get_content(instance_file)404        method = int(utils.get_opt("METHOD", content, -3))405        binary = int(utils.get_opt("BINARY", content, 0))406        vtype = utils.get_opt("VTYPE", content, "I")407        out_file = VPSolver.new_tmp_file()408        opts = "{method:d} {binary:d} {vtype} {print_inst:d} {pyout:d}".format(409            method=method, binary=binary, vtype=vtype,410            print_inst=print_inst, pyout=pyout411        )412        VPSolver.run(413            "{} {} {}".format(VPSolver.VPSOLVER_EXEC, instance_file, opts),414            tee=out_file,415            verbose=verbose416        )417        output = utils.get_content(out_file)418        os.remove(out_file)419        return output, VPSolver.parse_vbpsol(output)420    @staticmethod421    def vbp2afg(instance_file, afg_file, opts="", verbose=None):422        """Call 'vbp2afg' to create an arc-flow graph for a .vbp instance."""423        if isinstance(instance_file, (VBP, MVP)):424            instance_file = instance_file.filename425        out_file = VPSolver.new_tmp_file()426        VPSolver.run(427            "{} {} {} {}".format(428                VPSolver.VBP2AFG_EXEC, instance_file, afg_file, opts429            ),430            tee=out_file,431            verbose=verbose432        )433        output = utils.get_content(out_file)434        os.remove(out_file)435        return output436    @staticmethod437    def afg2mps(afg_file, mps_file, opts="", verbose=None):438        """Call 'afg2mps' to create a .mps model for an arc-flow graph."""439        if isinstance(afg_file, AFG):440            afg_file = afg_file.filename441        out_file = VPSolver.new_tmp_file()442        VPSolver.run(443            "{} {} {} {}".format(444                VPSolver.AFG2MPS_EXEC, afg_file, mps_file, opts445            ),446            tee=out_file,447            verbose=verbose448        )449        output = utils.get_content(out_file)450        os.remove(out_file)451        return output452    @staticmethod453    def afg2lp(afg_file, lp_file, opts="", verbose=None):454        """Call 'afg2lp' to create a .lp model for an arc-flow graph."""455        if isinstance(afg_file, AFG):456            afg_file = afg_file.filename457        out_file = VPSolver.new_tmp_file()458        VPSolver.run(459            "{} {} {} {}".format(460                VPSolver.AFG2LP_EXEC, afg_file, lp_file, opts461            ),462            tee=out_file,463            verbose=verbose464        )465        output = utils.get_content(out_file)466        os.remove(out_file)467        return output468    @staticmethod469    def afg2svg(afg_file, svg_file, verbose=None):470        """Draw a .afg arc-flow graph in .svg format."""471        if isinstance(afg_file, AFG):472            afg_file = afg_file.filename473        AFG.from_file(afg_file).draw(svg_file)474    @staticmethod475    def script(script_name, arg1=None, arg2=None, options=None, pyout=True,476               verbose=None):477        """Call a VPSolver script and return a vector packing solution."""478        cmd = script_name479        for arg in [arg1, arg2]:480            if isinstance(arg, MPS):481                cmd += " --mps {}".format(arg.filename)482            elif isinstance(arg, LP):483                cmd += " --lp {}".format(arg.filename)484            elif isinstance(arg, AFG):485                cmd += " --afg {}".format(arg.filename)486            elif isinstance(arg, VBP):487                cmd += " --vbp {}".format(arg.filename)488            elif isinstance(arg, MVP):489                cmd += " --mvp {}".format(arg.filename)490            elif isinstance(arg, six.string_types):491                if arg.endswith(".mps"):492                    cmd += " --mps {}".format(arg)493                elif arg.endswith(".lp"):494                    cmd += " --lp {}".format(arg)495                elif arg.endswith(".afg"):496                    cmd += " --afg {}".format(arg)497                elif arg.endswith(".vbp"):498                    cmd += " --vbp {}".format(arg)499                elif arg.endswith(".mvp"):500                    cmd += " --mvp {}".format(arg)501                else:502                    raise Exception("Invalid file extension!")503        if options is not None:504            cmd += " --options \"{}\"".format(options)505        if pyout is True:506            cmd += " --pyout"507        out_file = VPSolver.new_tmp_file()508        VPSolver.run(cmd, tee=out_file, verbose=verbose)509        output = utils.get_content(out_file)510        os.remove(out_file)511        return output, VPSolver.parse_vbpsol(output)512    @staticmethod513    def script_wsol(script_name, model, options=None, verbose=None):514        """Call a solver script and return the solution."""515        from pympl import Tools516        if verbose is None:517            verbose = VPSolver.VERBOSE518        if isinstance(model, (LP, MPS)):519            model = model.filename520        return Tools.script(521            script_name=script_name, model=model, options=options,...

test_vpsolver.py

Source:test_vpsolver.py

...21    """Test vbpsolver."""22    from pyvpsolver import VPSolver23    from pyvpsolver.solvers import vbpsolver24    W, w, b = (1,), [(1,)], [1]25    lp_file = VPSolver.new_tmp_file(".lp")26    mps_file = VPSolver.new_tmp_file(".mps")27    svg_file = VPSolver.new_tmp_file(".svg")28    solution = vbpsolver.solve(W, w, b, script="vpsolver_glpk.sh")29    vbpsolver.print_solution(solution)30    obj, patterns = solution31    assert obj == 132    solution = vbpsolver.solve(33        W, w, b, lp_file=lp_file, mps_file=mps_file, svg_file=svg_file,34        script="vpsolver_glpk.sh"35    )36    vbpsolver.print_solution(solution)37    obj, patterns = solution38    assert obj == 139    vbpsolver.print_solution(obj, patterns)40def test_mvpsolvers():41    """Test mvpsolvers."""42    from pyvpsolver import VPSolver43    from pyvpsolver.solvers import mvpsolver2013, mvpsolver201644    Ws = [(100, 75), (75, 50), (75, 50), (100, 100)]45    Cs = [3, 2, 3, 100]46    Qs = [inf, -1, -1, -1]47    ws = [[(75, 50)], [(40, 75), (25, 25)]]48    b = [2, 1]49    for mvpsolver in [mvpsolver2013, mvpsolver2016]:50        solution = mvpsolver.solve(51            Ws, Cs, Qs, ws, b, script="vpsolver_glpk.sh"52        )53        mvpsolver.print_solution(solution)54        obj, patterns = solution55        assert obj == 556        lp_file = VPSolver.new_tmp_file(".lp")57        mps_file = VPSolver.new_tmp_file(".mps")58        svg_file = VPSolver.new_tmp_file(".svg")59        solution = mvpsolver.solve(60            Ws, Cs, Qs, ws, b, lp_file=lp_file, mps_file=mps_file,61            svg_file=svg_file, script="vpsolver_glpk.sh", verbose=True62        )63        mvpsolver.print_solution(solution)64        obj, patterns = solution65        assert obj == 566        mvpsolver.print_solution(obj, patterns)67def test_scripts():68    """Test scripts."""69    from pyvpsolver import VPSolver, VBP, MVP, AFG, LP, MPS70    VPSolver.clear()71    vbp = VBP(W=(1,), w=[(1,)], b=[1], verbose=True)72    mvp = MVP(Ws=[(1,)], Cs=[1], Qs=[inf], ws=[[(1,)]], b=[1], verbose=True)73    for instance in [vbp, mvp]:74        afg = AFG(instance, verbose=True)75        lp = LP(afg, verbose=True)76        mps = MPS(afg, verbose=True)77        VPSolver.set_verbose(False)78        output, solution = VPSolver.script(79            "vpsolver_glpk.sh", instance, options="--seed 1234"80        )81        assert solution[0] == 182        if isinstance(instance, (VBP, MVP)):83            instance_file = instance.filename84        output, solution = VPSolver.script("vpsolver_glpk.sh", instance_file)85        assert solution[0] == 186        output, solution = VPSolver.script("vpsolver_glpk.sh", afg)87        assert solution[0] == 188        output, solution = VPSolver.script("vpsolver_glpk.sh", afg, lp)89        assert solution[0] == 190        output, solution = VPSolver.script("vpsolver_glpk.sh", afg, mps)91        assert solution[0] == 192        output, solution = VPSolver.script("vpsolver_glpk.sh", lp)93        assert solution is None94        output, solution = VPSolver.script("vpsolver_glpk.sh", mps)95        assert solution is None96        output, solution = VPSolver.script("vpsolver_glpk.sh", afg.filename)97        assert solution[0] == 198        output, solution = VPSolver.script("vpsolver_glpk.sh", lp.filename)99        assert solution is None100        output, solution = VPSolver.script("vpsolver_glpk.sh", mps.filename)101        assert solution is None102def test_vbpsol():103    """Test vbpsol."""104    from pyvpsolver import VPSolver, VBP, MVP, AFG, LP, MPS105    vbp = VBP(W=(1,), w=[(1,)], b=[1], verbose=True)106    afg = AFG(vbp, verbose=True)107    lp = LP(afg, verbose=True)108    sol_file = VPSolver.new_tmp_file(".sol")109    output, solution = VPSolver.script_wsol("vpsolver_glpk.sh", lp)110    assert isinstance(solution, dict)111    with open(sol_file, "w") as f:112        lst = []113        for var, value in solution.items():114            lst.append(str(var))115            lst.append(str(value))116        print(" ".join(lst), file=f)117    obj, patterns = VPSolver.vbpsol(afg, sol_file)118    assert obj == 1119def test_draw():120    """Test scripts."""121    from pyvpsolver import VPSolver, VBP, MVP, AFG122    vbp = VBP(W=(1,), w=[(1,)], b=[1])123    mvp = MVP(Ws=[(1,)], Cs=[1], Qs=[inf], ws=[[(1,)]], b=[1])124    svg_file = VPSolver.new_tmp_file(".svg")125    for instance in [vbp, mvp]:126        afg = AFG(instance)127        try:128            afg.draw(129                svg_file, lpaths=True, graph_attrs={"size": "8,8"}130            )131        except Exception as e:132            print(repr(e))133        try:134            VPSolver.afg2svg(afg, svg_file)135        except Exception as e:136            print(repr(e))137        try:138            VPSolver.afg2svg(afg.filename, svg_file)139        except Exception as e:140            print(repr(e))141def test_lowlevel():142    """Test low-level API."""143    from pyvpsolver import VPSolver, VBP, MVP, AFG144    vbp = VBP(W=(1,), w=[(1,)], b=[1])145    mvp = MVP(Ws=[(1,)], Cs=[1], Qs=[inf], ws=[[(1,)]], b=[1])146    afg_file = VPSolver.new_tmp_file(".afg")147    lp_file = VPSolver.new_tmp_file(".lp")148    mps_file = VPSolver.new_tmp_file(".mps")149    svg_file = VPSolver.new_tmp_file(".svg")150    VPSolver.vbp2afg(vbp, afg_file)151    VPSolver.vbp2afg(mvp, afg_file)152    VPSolver.vbp2afg(vbp.filename, afg_file)153    VPSolver.vbp2afg(mvp.filename, afg_file)154    VPSolver.afg2lp(afg_file, lp_file)155    VPSolver.afg2mps(afg_file, mps_file)156    VPSolver.afg2lp(AFG(vbp), lp_file)157    VPSolver.afg2mps(AFG(mvp), mps_file)158if __name__ == "__main__":159    test_vbpsolver()160    test_mvpsolvers()161    test_scripts()162    test_vbpsol()163    test_draw()...

tools.py

Source:tools.py

...35        """Enable/disable verbose output."""36        if verbose is not None:37            Tools.VERBOSE = verbose38    @staticmethod39    def new_tmp_file(ext="tmp"):40        """Create temporary files."""41        if not ext.startswith("."):42            ext = ".{0}".format(ext)43        fname = "{0}/{1}{2}".format(Tools.TMP_DIR, Tools.TMP_CNT, ext)44        Tools.TMP_CNT += 145        if not os.path.exists(Tools.TMP_DIR):46            os.makedirs(Tools.TMP_DIR)47        return fname48    @staticmethod49    @atexit.register50    def clear():51        """Delete temporary files and kill child processes."""52        for p in Tools.PLIST:53            try:54                os.killpg(p.pid, signal.SIGTERM)55            except:56                pass57        try:58            shutil.rmtree(Tools.TMP_DIR)59        except:60            pass61    @staticmethod62    def log(msg, verbose=None):63        """Log function."""64        if verbose is None:65            verbose = Tools.VERBOSE66        if verbose:67            print(msg)68    @staticmethod69    def run(cmd, tee=None, grep=None, grepv=None, verbose=None):70        """Run a system command."""71        if verbose is None:72            verbose = Tools.VERBOSE73        proc = subprocess.Popen(74            cmd, shell=True,75            stdout=subprocess.PIPE,76            stderr=subprocess.STDOUT,77            preexec_fn=os.setsid78        )79        Tools.PLIST.append(proc)80        def pipe_output(fin, fout_list, grep=None, grepv=None):81            while True:82                line = fin.readline().decode("utf-8")83                if not line:84                    break85                if grep is not None and grep not in line:86                    continue87                if grepv is not None and grepv in line:88                    continue89                for f in fout_list:90                    f.write(line)91                    f.flush()92        if tee is None:93            if verbose:94                pipe_output(proc.stdout, [sys.stdout], grep, grepv)95        else:96            with open(tee, "w") as ftee:97                if verbose:98                    pipe_output(proc.stdout, [sys.stdout, ftee], grep, grepv)99                else:100                    pipe_output(proc.stdout, [ftee], grep, grepv)101        exit_code = proc.wait()102        proc.stdout.close()103        if exit_code != 0:104            raise RuntimeError("failed to run '{0}'".format(cmd))105    @staticmethod106    def script(script_name, model, options=None, verbose=None):107        """Call a solver script and returns the solutions."""108        cmd = script_name109        if model.endswith(".mps"):110            cmd += " --mps {0}".format(model)111        elif model.endswith(".lp"):112            cmd += " --lp {0}".format(model)113        else:114            raise Exception("Invalid file extension!")115        if options is not None:116            cmd += " --options \"{0}\"".format(options)117        out_file = Tools.new_tmp_file()118        sol_file = Tools.new_tmp_file(".sol")119        Tools.run(120            "{0} --wsol {1}".format(cmd, sol_file),121            tee=out_file,122            verbose=verbose123        )124        with open(out_file) as f:125            output = f.read()126        os.remove(out_file)127        try:128            with open(sol_file) as f:129                sol = f.read().split()130                values = {}131                assert len(sol) % 2 == 0132                for i in range(0, len(sol), 2):...

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