minor improves

dios/dios.py

@@ -354,7 +354,7 @@ class DictOfSeries:
         locations, just like `series.loc[:]=val` or `df[:]=val` do.
 
         Eg.
-        di1[::2] = di[::3]   ->   di[::2]
+         di[::2] = di[::3]   ->   di[::2]
 
             x |        x |            x |
         ===== |     ==== |       ====== |
@@ -767,7 +767,7 @@ def pprint_dios(dios,
     # now data only contains series that we want to print.
 
     # if any series exceed max_rows we trim all series to min_rows
-    series_lengths = data.apply(len)
+    series_lengths = data.apply(len).to_list()
     series_maxlen = max(series_lengths)
     trunc_rows = series_maxlen > max_rows
     max_rows = min_rows if trunc_rows else series_maxlen
@@ -812,7 +812,7 @@ def pprint_dios(dios,
     # columns.
     valstr_len = [len(c[0]) for c in outer]
 
-    rows = max_rows + 1  # colname
+    rows = max_rows + 1  # colnames aka. header
     rows += 1 if trunc_rows else 0  # `...` in rows
     rows += 1 if header_delim else 0  # underline header
 
@@ -821,10 +821,11 @@ def pprint_dios(dios,
             colheader = (header_delim * valstr_len[i])[:valstr_len[i]]
             c.insert(1, colheader)
 
-    delim = ' ... '
+    dots = ' ... '
     if trunc_cols:
-        outer.insert(max_cols // 2, [delim] * rows)
-        valstr_len.insert(max_cols // 2, len(delim))
+        outer.insert(max_cols // 2, [dots] * rows)
+        valstr_len.insert(max_cols // 2, len(dots))
+        series_lengths.insert(max_cols//2, rows)
 
     txt = ""
     for r in range(rows):
@@ -838,17 +839,12 @@ def pprint_dios(dios,
 
     # add footer
     if show_dimensions:
-        # correction because the collections `series_lengths`
-        # and `valstr_len` differ by 1 in length. very hacky!
-        # todo: use a dict/df or dios(?!) to store the str-data
-        corr = 0
         for i, c in enumerate(outer):
             # ignore the dot-column
             if trunc_cols and i == max_cols//2:
-                txt += delim + ' ' * len(col_delim)
-                corr = 1
+                txt += dots + ' ' * len(col_delim)
             else:
-                txt += f"[{series_lengths.iat[i-corr]}]".ljust(valstr_len[i] + len(col_delim))
+                txt += f"[{series_lengths[i]}]".ljust(valstr_len[i] + len(col_delim))
 
         txt += f'\n\nmax: [{maxlen} rows x {len(dios.columns)} columns]'
         txt += '\n'