added boolean argument export_to_excel to LArray.dump() method. Defaults to True.

Author: alixdamman

larray/core/array.py

@@ -2406,7 +2406,7 @@ def as_table(self, maxlines=None, edgeitems=5, light=False, wide=True, value_nam
                 # returns next line (labels of N-1 first axes + data)
                 yield list(tick) + dataline.tolist()
 
-    def dump(self, header=True, wide=True, value_name='value'):
+    def dump(self, header=True, wide=True, value_name='value', export_to_excel=True):
         """Dump array as a 2D nested list
 
         Parameters
@@ -2420,16 +2420,23 @@ def dump(self, header=True, wide=True, value_name='value'):
         value_name : str, optional
             Name of the column containing the values (last column) when `wide=False` (see above).
             Not used if header=False. Defaults to 'value'.
+        export_to_excel: boolean, optional
+            Whether or not to prepare special values (like NaNs) before data is dumped to an Excel sheet.
+            Defaults to True.
 
         Returns
         -------
         2D nested list
         """
         if not header:
             # flatten all dimensions except the last one
-            return self.data.reshape(-1, self.shape[-1]).tolist()
+            res = self.data.reshape(-1, self.shape[-1]).tolist()
         else:
-            return list(self.as_table(wide=wide, value_name=value_name))
+            res = list(self.as_table(wide=wide, value_name=value_name))
+        if export_to_excel:
+            from xlwings import xlplatform
+            res = [[xlplatform.prepare_xl_data_element(x) for x in row] for row in res]
+        return res
 
     # XXX: should filter(geo=['W']) return a view by default? (collapse=True)
     # I think it would be dangerous to make it the default