def print_signature(out):
from docplex.version import docplex_version_string
osa = OutputStreamAdapter(out)
osa.write("<?xml version='1.0' encoding='utf-8'?>\n")
osa.write(
"<!-- This file has been generated by DOcplex version {} -->\n".
format(docplex_version_string))
def print_signature(out, write_level):
from docplex.version import docplex_version_string
osa = OutputStreamAdapter(out)
osa.write(
"<!-- This file has been generated by DOcplex version {} -->\n".
format(docplex_version_string))
osa.write("<!-- Write level is WriteLevel.{0} -->\n".format(
write_level.name))
def print_to_stream2(cls, out, solutions, indent=None, **kwargs):
# solutions can be either a plain solution or a sequence or an iterator
sol_to_print = list(solutions) if is_iterable(solutions) else [solutions]
# encode all solutions in dict ready for json output
encoder = SolutionJSONEncoder(**kwargs)
solutions_as_dict = [encoder.default(sol) for sol in sol_to_print]
# use an output stream adapter for py2/py3 and str/unicode compatibility
osa = OutputStreamAdapter(out)
if len(sol_to_print) == 1: # if only one solution, use at root node
osa.write(json.dumps(solutions_as_dict[0], indent=indent))
else: # for multiple solutions, we want a "CPLEXSolutions" root
osa.write(json.dumps({"CPLEXSolutions": solutions_as_dict}, indent=indent))
def print(cls, out, model):
osa = OutputStreamAdapter(out)
cls.print_signature(out)
# <CPLEXSolution version="1.0">
osa.write(cls.annotations_start_tag)
osa.write(cls.benders_start_tag)
for cplex_scope, annotated in iteritems(model.get_annotations_by_scope()):
anno_objtype = cls.cplex_anno_objtype_map.get(cplex_scope)
if anno_objtype is not None and annotated:
osa.write(" <object type='{0:d}'>\n".format(anno_objtype))
for obj, benders_value in annotated: # FIXME: what if no name??
obj_index = obj.index # not checked
anno_name = cls._anno_name(cplex_scope, obj.get_name(), obj_index)
if obj_index >= 0 :
# ignore objects not added to the model
osa.write(" <anno name='{0}' index='{1:d}' value='{2:d}'/>\n".format(anno_name, obj_index, benders_value))
osa.write(' </object>\n')
# </CPLEXAnnotations>
osa.write(cls.benders_end_tag)
osa.write(cls.annotations_end_tag)
osa.write('\n')
def print_one_solution(cls, sol, out, print_header=True):
osa = OutputStreamAdapter(out)
if print_header:
osa.write(cls.mst_header)
cls.print_signature(out)
# <CPLEXSolution version="1.0">
osa.write(cls.one_solution_start_tag)
osa.write("\n")
# <header
# problemName="foo"
# objectiveValue="42"
# />
osa.write(" <header\n problemName=\"{0}\"\n".format(
sol.problem_name))
if sol.has_objective():
osa.write(" objectiveValue=\"{0:g}\"\n".format(
sol.objective_value))
osa.write(" />\n")
# prepare reduced costs
""" For mst, we don't want this !
model = sol.model
if not model._solves_as_mip():
reduced_costs = model.reduced_costs(model.iter_variables())
else:
reduced_costs = []
"""
# <variables>
# <variable name="x1" index ="1" value="3.14"/>
# </variables>
osa.write(" <variables>\n")
""" For mst, we don't want this !
for (dvar, rc) in zip_longest(model.iter_variables(), reduced_costs,
fillvalue=None):
var_name = dvar.name
var_value = sol[dvar]
var_index = dvar.index
rc_string = ""
if rc is not None:
rc_string = "reducedCost=\"{}\"".format(rc)
osa.write(" <variable name=\"{0}\" index=\"{1}\" value=\"{2:g}\" {3}/>\n"
.format(var_name, var_index, var_value, rc_string))
"""
for dvar, val in sol.iter_var_values():
var_name = dvar.print_name()
var_value = sol[dvar]
var_index = dvar.index
osa.write(
" <variable name=\"{0}\" index=\"{1}\" value=\"{2:g}\"/>\n".
format(var_name, var_index, var_value))
osa.write(" </variables>\n")
# </CPLEXSolution version="1.0">
osa.write(cls.one_solution_end_tag)
osa.write("\n")
def print_many_solutions(cls, sol_seq, out):
osa = OutputStreamAdapter(out)
osa.write(cls.mst_header)
cls.print_signature(out)
# <CPLEXSolutions version="1.0">
osa.write(cls.many_solution_start_tag)
osa.write("\n")
for sol in sol_seq:
cls.print_one_solution(sol, out, print_header=False)
# <CPLEXSolutions version="1.0">
osa.write(cls.many_solution_end_tag)
osa.write("\n")
def print_one_solution(cls,
sol,
out,
print_header=True,
use_lp_names=True,
write_level=None,
effort_level=None):
osa = OutputStreamAdapter(out)
if print_header:
osa.write(cls.mst_header)
cls.print_signature(out, write_level)
# <CPLEXSolution version="1.0">
osa.write(cls.one_solution_start_tag)
osa.write("\n")
# <header
# problemName="foo"
# objectiveValue="42"
# />
osa.write(" <header\n problemName=\"{0}\"\n".format(
sol.problem_name))
if sol.has_objective():
osa.write(" objectiveValue=\"{0:g}\"\n".format(
sol.objective_value))
if effort_level is not None:
# assert this is an integer
eff = EffortLevel.parse(effort_level)
if eff != EffortLevel.Auto:
osa.write(" MIPStartEffortLevel=\"{0:d}\"\n".format(
eff.value))
osa.write(" />\n")
# <variables>
# <variable name="x1" index ="1" value="3.14"/>
# </variables>
osa.write(" <variables>\n")
"""
osa.write(" <variable name=\"{0}\" index=\"{1}\" value=\"{2:g}\" {3}/>\n"
.format(var_name, var_index, var_value, rc_string))
"""
print_generated = cls.print_generated_vars
filter_discrete = write_level.filter_discrete()
eps = 1e-16
if write_level.filter_zeros():
for dvar, _ in sol.iter_var_values():
if print_generated or not dvar.is_generated():
if not filter_discrete or dvar.is_discrete():
var_name = LPFormat.lp_var_name(
dvar) if use_lp_names else dvar.name
var_value = sol[dvar]
if abs(var_value) >= eps:
var_index = dvar.index
if var_name:
osa.write(
" <variable name=\"{0}\" index=\"{1}\" value=\"{2:g}\"/>\n"
.format(var_name, var_index, var_value))
else:
osa.write(
" <variable index=\"{1}\" value=\"{2:g}\"/>\n"
.format(var_name, var_index, var_value))
else:
# iterate on all variebls
for dvar in sol.model.generate_user_variables():
if (not filter_discrete) or dvar.is_discrete():
var_name = LPFormat.lp_var_name(
dvar) if use_lp_names else dvar.name
var_value = sol[dvar]
var_index = dvar.index
if var_name:
osa.write(
" <variable name=\"{0}\" index=\"{1}\" value=\"{2:g}\"/>\n"
.format(var_name, var_index, var_value))
else:
osa.write(
" <variable index=\"{1}\" value=\"{2:g}\"/>\n".
format(var_name, var_index, var_value))
osa.write(" </variables>\n")
# </CPLEXSolution version="1.0">
osa.write(cls.one_solution_end_tag)
osa.write("\n")
def print_many_solutions(cls,
sol_seq,
out,
use_lp_names,
write_level,
effort_level=None):
osa = OutputStreamAdapter(out)
osa.write(cls.mst_header)
cls.print_signature(out, write_level)
# <CPLEXSolutions version="1.0">
osa.write(cls.many_solution_start_tag)
osa.write("\n")
efforts = [EffortLevel.Auto]
if effort_level is None:
pass
elif is_iterable(effort_level):
efforts = effort_level
else:
efforts = [effort_level]
for sol, effort in izip_longest(sol_seq,
efforts,
fillvalue=EffortLevel.Auto):
cls.print_one_solution(sol,
out,
print_header=False,
use_lp_names=use_lp_names,
write_level=write_level,
effort_level=effort)
# <CPLEXSolutions version="1.0">
osa.write(cls.many_solution_end_tag)
osa.write("\n")