maybe fix of failing empty line problem in dlc highlevel

wetb/dlc/high_level.py

@@ -100,6 +100,7 @@ class DLCHighLevel(object):
         self.dlc_df = pd.read_excel(self.filename, sheetname='DLC', skiprows=[1])
         # empty strings are now nans, convert back to empty strings
         self.dlc_df.fillna('', inplace=True)
+        self.dlc_df.fillna('\n', inplace=True)
         # force headers to lower case
         self.dlc_df.columns = [k.lower() for k in self.dlc_df.columns]
         if 'dlc' not in self.dlc_df.columns and 'name' in self.dlc_df.columns:

wetb/dlc/tests/test_high_level.py

@@ -31,7 +31,6 @@ class TestDLCHighLevel(unittest.TestCase):
     def test_sensor_info_filter(self):
         self.assertEqual(list(self.dlc_hl.sensor_info(['fatigue']).m), [4, 4, 10])
 
-
     def test_fatigue_distribution_pct(self):
         dlc, wsp, wdir = self.dlc_hl.fatigue_distribution()['12']
         self.assertEqual(dlc[12], 0.975)
@@ -46,6 +45,9 @@ class TestDLCHighLevel(unittest.TestCase):
         self.assertEqual(max(wsp.keys()), 25)
         self.assertEqual(wsp[4], "#1000")
 
+    def test_fatigue_distribution_empty_line(self):
+        self.dlc_hl.dlc_df['load']
+
     def test_file_hour_lst(self):
         f, h = self.dlc_hl.file_hour_lst()[0]
         self.assertEqual(os.path.abspath(f), os.path.abspath(testfilepath + 'res/dlc12_iec61400-1ed3/dlc12_wsp04_wdir350_s3001.sel'))