DeprecationWarning when using z.show with non Integer index in DataFrame

If z.show is used with a Panda DataFrame that has a timestamp as index, then a DeprecationWarning appears for every row in the data frame.

Steps to reproduce:

• Execute the following code with python interpreter:

import pandas as pd

idx = pd.date_range('20230530', periods=3, freq='D')
df = pd.DataFrame({'name':['a','b','c']}, index= idx)
z.show(df, show_index=True)

Expected result:

• A table of the data frame
• No warnings

Observed result:

• A table of the data frame
• A deprecation warning for every row in the data frame