def _cplex_read(cls, filename, verbose=False):
# print("-> start reading file: {0}".format(filename))
cpx = _safe_cplex()
# no warnings
if not verbose:
cpx.set_results_stream(None)
cpx.set_log_stream(None)
cpx.set_warning_stream(None)
cpx.set_error_stream(None) # remove messages about names
try:
cpx.read(filename)
return cpx
except CplexError as cpx_e:
raise ModelReaderError("*CPLEX error {0!s} reading file {1} - exiting".format(cpx_e, filename))
def __enter__(self):
cpx = _safe_cplex()
# no output from CPLEX
cpx.set_results_stream(None)
cpx.set_log_stream(None)
cpx.set_warning_stream(None)
cpx.set_error_stream(None)
self_read_fn = cpx
for m in self._read_method:
self_read_fn = self_read_fn.__getattribute__(m)
try:
self_read_fn(self._filename)
self._cplex = cpx
return cpx
except CplexError as cpx_e: # pragma: no cover
# delete cplex instance
del cpx
raise ModelReaderError("*CPLEX error {0!s} reading file {1} - exiting".format(cpx_e, self._filename))