yobogoya questions

• (pandas) Why does .bfill().ffill() act differently than ffill().bfill() on groups?
• (pandas) Create new column based on first element in groupby object
• (pandas) Drop duplicates based on subset where order doesn't matter
• pandas: How to get .to_string() method to align column headers with column values?
• pandas: Is it possible to filter a dataframe with arbitrarily long boolean criteria?
• Filter array of objects by sub array of values

yobogoya answers