Merge pull request #51 from seatable/dateutils-add-isomonth

Dateutils add isomonth

Author: freeplant

demo/dateutils_test.py

@@ -80,3 +80,6 @@
 
 print(dateutils.isoweeknum('2012-1-2')) # 1, monday
 print(dateutils.weeknum('2012-1-2')) # 2, monday
+
+# 19. dateutils.isomonth
+print(dateutils.isomonth('2012-1-2'))

seatable_api/date_utils.py

@@ -202,5 +202,13 @@ def isoweeknum(self, time_str):
         """
         return self._str2datetime(time_str).isocalendar()[1]
 
+    def isomonth(self, time_str):
+        year = self.year(time_str)
+        month = self.month(time_str)
+
+        date_str = self.date(year, month, 1)
+        return date_str[0:-3]
+
+
 
 dateutils = DateUtils()