xrmx commented on a change in pull request #4394: Implement the column config
and row config in pivot table
URL:
https://github.com/apache/incubator-superset/pull/4394#discussion_r167797482
##########
File path: superset/viz.py
##########
@@ -584,8 +584,12 @@ def get_data(self, df):
# Display metrics side by side with each column
if self.form_data.get('combine_metric'):
df = df.stack(0).unstack()
+ parsed_columns = list(map(
Review comment:
Not sure if this code is needed / wanted but maps in python are a bit
convoluted. What about using list comprehension?
```
to_list = lambda x: [six.text_type(z) for z in x] if isinstance(x, tuple)
else [x]
parsed_columns = [to_list(x) for x in df.columns.values]
```
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