pandas 0.20 compatibility (#326)

* fix Location.get_clearsky for pandas 0.20

* fix ephemeris for pandas 0.20

* add whatsnew

* fix whatsnew issue number

Author: wholmgren

docs/sphinx/source/whatsnew.rst

@@ -6,6 +6,7 @@ What's New
 
 These are new features and improvements of note in each release.
 
+.. include:: whatsnew/v0.4.5.txt
 .. include:: whatsnew/v0.4.4.txt
 .. include:: whatsnew/v0.4.3.txt
 .. include:: whatsnew/v0.4.2.txt

docs/sphinx/source/whatsnew/v0.4.5.txt

@@ -0,0 +1,17 @@
+.. _whatsnew_0450:
+
+v0.4.5 (May xx, 2017)
+---------------------
+
+
+Bug fixes
+~~~~~~~~~
+
+* Fix pandas 0.20 incompatibilities in Location.get_clearsky,
+  solarposition.ephemeris (:issue:`325`)
+
+
+Contributors
+~~~~~~~~~~~~
+
+* Will Holmgren

pvlib/location.py

@@ -191,7 +191,7 @@ def get_clearsky(self, times, model='ineichen', solar_position=None,
             Column names are: ``ghi, dni, dhi``.
         """
         if dni_extra is None:
-            dni_extra = irradiance.extraradiation(times.dayofyear)
+            dni_extra = irradiance.extraradiation(times)
 
         try:
             pressure = kwargs.pop('pressure')

pvlib/solarposition.py

@@ -616,10 +616,11 @@ def ephemeris(time, latitude, longitude, pressure=101325, temperature=12):
     DecHours = (time_utc.hour + time_utc.minute/60. + time_utc.second/3600. +
                 time_utc.microsecond/3600.e6)
 
-    UnivDate = DayOfYear
-    UnivHr = DecHours
+    # np.array needed for pandas > 0.20
+    UnivDate = np.array(DayOfYear)
+    UnivHr = np.array(DecHours)
 
-    Yr = time_utc.year - 1900
+    Yr = np.array(time_utc.year) - 1900
     YrBegin = 365 * Yr + np.floor((Yr - 1) / 4.) - 0.5
 
     Ezero = YrBegin + UnivDate