add python 3.9 support for postprocessing

gw_eccentricity/postprocess/core.py

@@ -1,3 +1,5 @@
+"""Core postprocessing functions for measuring eccentricity from waveform modes."""
+from __future__ import annotations
 from dataclasses import dataclass
 import logging
 import pandas as pd

gw_eccentricity/postprocess/postprocess.py

@@ -1,4 +1,5 @@
 """Module to reconstruct eccentricity posterior using gw_eccentricity."""
+from __future__ import annotations
 import matplotlib.pyplot as plt
 import pandas as pd
 from joblib import Parallel, delayed

gw_eccentricity/postprocess/postprocess_cli.py

@@ -1,4 +1,5 @@
 """Run eccentricity postprocessing in parallel using MPI."""
+from __future__ import annotations
 import argparse
 import importlib
 import importlib.util

gw_eccentricity/postprocess/postprocess_for_bilby.py

@@ -1,4 +1,5 @@
 """Reconstruct eccentricity posterior from Bilby generated posterior."""
+from __future__ import annotations
 import bilby
 import pandas as pd
 from .postprocess import PostProcess