Log the NNDC data source used for parsing (#359)

carsus/io/nuclear/nndc.py

@@ -1,3 +1,5 @@
+import logging
+
 import pandas as pd
 from pathlib import Path
 import subprocess
@@ -8,6 +10,8 @@
 
 NNDC_SOURCE_URL = "https://github.com/tardis-sn/carsus-data-nndc"
 
+logger = logging.getLogger(__name__)
+
 
 class NNDCReader:
     """
@@ -34,10 +38,13 @@ def __init__(self, dirname=None, remote=False):
         if dirname is None:
             if remote:
                 subprocess.run(['git', 'clone', NNDC_SOURCE_URL, DECAY_DATA_SOURCE_DIR])
+                logger.info(f"Downloading NNDC decay data from {NNDC_SOURCE_URL}")
             self.dirname = Path().joinpath(DECAY_DATA_SOURCE_DIR, "csv")
         else:
             self.dirname = dirname
 
+        logger.info(f"Parsing decay data from: {DECAY_DATA_SOURCE_DIR}/csv")
+
         self._decay_data = None
 
     @property