Change freq M to MS

Author: AdamRJensen

pvlib/iotools/bsrn.py

@@ -162,8 +162,7 @@ def get_bsrn(station, start, end, username, password,
     end = pd.to_datetime(end)
 
     # Generate list files to download based on start/end (SSSMMYY.dat.gz)
-    filenames = pd.date_range(
-        start, end.replace(day=1) + pd.DateOffset(months=1), freq='1M')\
+    filenames = pd.date_range(start, end, freq='1MS')\
         .strftime(f"{station}%m%y.dat.gz").tolist()
 
     # Create FTP connection

pvlib/iotools/srml.py

@@ -236,8 +236,7 @@ def get_srml(station, start, end, filetype='PO', map_variables=True,
     end = pd.to_datetime(end)
 
     # Generate list of months
-    months = pd.date_range(
-        start, end.replace(day=1) + pd.DateOffset(months=1), freq='1M')
+    months = pd.date_range(start, end, freq='1MS')
     months_str = months.strftime('%y%m')
 
     # Generate list of filenames

tests/test_clearsky.py

@@ -234,8 +234,8 @@ def test_lookup_linke_turbidity_months():
 
 
 def test_lookup_linke_turbidity_months_leapyear():
-    times = pd.date_range(start='2016-04-01', end='2016-07-01',
-                          freq='1M', tz='America/Phoenix')
+    times = pd.date_range(start='2014-05-01', end='2014-07-01',
+                          freq='1ME', tz='America/Phoenix')
     expected = pd.Series(
         np.array([2.89918032787, 2.97540983607, 3.19672131148]), index=times
     )