def _parse_parameter_file(self):
with open(self.parameter_filename, "rb") as f:
hvals = fpu.read_cattrs(f, header_dt)
hvals.pop("unused")
self.dimensionality = 3
self.refine_by = 2
self.unique_identifier = \
int(os.stat(self.parameter_filename)[stat.ST_CTIME])
prefix = ".".join(self.parameter_filename.rsplit(".", 2)[:-2])
self.filename_template = "%s.%%(num)s%s" % (prefix, self._suffix)
self.file_count = len(glob.glob(prefix + ".*" + self._suffix))
# Now we can set up things we already know.
self.cosmological_simulation = 1
self.current_redshift = (1.0 / hvals['scale']) - 1.0
self.hubble_constant = hvals['h0']
self.omega_lambda = hvals['Ol']
self.omega_matter = hvals['Om']
cosmo = Cosmology(self.hubble_constant,
self.omega_matter, self.omega_lambda)
self.current_time = cosmo.hubble_time(self.current_redshift).in_units("s")
self.periodicity = (True, True, True)
self.particle_types = ("halos")
self.particle_types_raw = ("halos")
self.domain_left_edge = np.array([0.0,0.0,0.0])
self.domain_right_edge = np.array([hvals['box_size']] * 3)
nz = 1 << self.over_refine_factor
self.domain_dimensions = np.ones(3, "int32") * nz
self.parameters.update(hvals)
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