Using logging instead of printing.

orekit_jpype/pyhelpers.py

@@ -106,25 +106,26 @@ s
             import orekitdata
             datafile = File(orekitdata.__path__[0])
             if not datafile.exists():
-                print(f"""Unable to find orekitdata library folder,
+                logging.info(f"""Unable to find orekitdata library folder,
                       will try to load Orekit data using the folder or filename {filename}""")
             else:
                 filename = orekitdata.__path__[0]
                 data_load_from_library_sucessful = True
-        except ImportError:
-            print(f"""Failed to load orekitdata library.
+        except ImportError as e:
+            logging.warning(f"""Failed to load orekitdata library.
                   Install with `pip install git+https://gitlab.orekit.org/orekit/orekit-data.git`
                   Will try to load Orekit data using the folder or filename {filename}""")
 
+
     if not data_load_from_library_sucessful:
         if filename is None:
-            print("filename argument was None, unable to load orekit data from file or folder")
-            return
+            logging.warning("filename argument was None, unable to load orekit data from file or folder")
+            raise FileNotFoundError("filename argument was None, unable to load orekit data from file or folder")
 
         datafile = File(filename)
         if not datafile.exists():
-            print('File or folder:', datafile.getAbsolutePath(), ' not found')
-            print("""
+            logging.warning('File or folder:', datafile.getAbsolutePath(), ' not found')
+            logging.warning("""
 
             The Orekit library relies on some external data for physical models.
             Typical data are the Earth Orientation Parameters and the leap seconds history,
@@ -139,14 +140,18 @@ s
             orekit.pyhelpers.download_orekit_data_curdir()
 
             """)
-            return
+            raise FileNotFoundError('File or folder:', datafile.getAbsolutePath(), ' not found')
+
 
+    logging.debug('Loading Orekit data from:', datafile.getAbsolutePath())
     if os.path.isdir(filename):
         crawler = DirectoryCrawler(datafile)
     elif os.path.isfile(filename):
         crawler = ZipJarCrawler(datafile)
     else:
-        print('filename ', filename, ' is neither a file nor a folder')
+        logging.warning('Could not load orekit data from filename: ', filename)
+        raise FileNotFoundError('Could not load orekit data from filename: ', filename)   
+    
     DM.clearProviders()
     DM.clearLoadedDataNames()
     DM.resetFiltersToDefault()