Reindexing a specific level of a MultiIndex dataframe

Question

I have a DataFrame with two indices and would like to reindex it by one of the indices.

from pandas_datareader import data
import matplotlib.pyplot as plt
im         


        

Answer 1

If you're looking to reindex on a certain level, then reindex accepts a level argument you can pass -

adj_close.reindex(all_weekdays, level=0)

When passing a level argument, you cannot pass a method argument at the same time (reindex throws a TypeError), so you can chain a ffill call after -

adj_close.reindex(all_weekdays, level=0).ffill()