Fix tabledf.

pyltk/table.py

@@ -61,8 +61,7 @@ class tabledf(table):
     def __init__(self, df, header=None, multilevels=False, fmt=None, **kargs):
         super().__init__(**kargs)
         if header is None:
-            header = self.create_header(df)
-            multilevels = True
+            multilevels, header = self.create_header(df)
             df = df.reset_index()
         if multilevels:
             ncols = len(header[-1])
@@ -74,13 +73,13 @@ class tabledf(table):
         else:
             tab.addrow(header)
         tab.addhline()
-        tab.addrows(df.as_matrix(), fmt=fmt)
+        tab.addrows(df.astype(object).values, fmt=fmt)
         self.add(tab)
 
     def create_header(self, df):
         cols = df.columns
         if not isinstance(cols, pd.MultiIndex):
-            return df.columns
+            return False, list(df.columns)
         idx = df.index.names
         header = []
         for levels, labels in zip(cols.levels, cols.labels):
@@ -89,4 +88,4 @@ class tabledf(table):
                 tmp.append(multicolumn(len(list(g)), levels[i]))
             header.append(tmp)
         header[-1] = idx + header[-1][1:]  # Update last row
-        return header
+        return True, header