Add preliminary power spectrum integration

postprocessor.py

@@ -1,5 +1,6 @@
 # coding: utf-8
 import pandas as pd
+import pspec_new
 from baseprocessor import *
 
 mass_func = lambda dset: dset["rho"] * dset["dx"] ** 3  # Mass function
@@ -584,6 +585,11 @@ class PostProcessor(HDF5Container):
 
         return sinks_dict
 
+    def _pspec(self):
+        outfile = self.path_out + "/pspec.h5"
+        pspec_new.pspec(repo=self.path, iouts=[self.num], outfile=outfile)
+        return outfile
+
     def def_rules(self):
 
         self.rules = {
@@ -674,6 +680,7 @@ class PostProcessor(HDF5Container):
                     "Teff": cst.K,
                 },
             ),
+            "pspec": Rule(self, self._pspec, "Power spectrum", "/hdf5"),
             # Helpers
             "radial_bins": Rule(self, self._radial_bins, "Radial bins", "/radial"),
             "rr": Rule(self, self._rr, "Coordinate map", "/maps"),