Quang Hoang questions

Quang Hoang answers

• Groupby, transform - revert back to original table
• Selecting time-window in a dataframe
• Cumulative sum sorted descending within a group. Pandas
• How do I convert numpy array to the form ((value0, row0, column0), (value1, row0, column1)...)?
• Pandas drop nan using first valid index by group
• Python: Standard Deviation within a list of dataframes
• Split Pandas Column of type String using fixed width (similar to Excel text-to-columns functionality with fixed width)
• how to get last date from last year from a given date in pandas
• Get integer index values from filtered pandas dataframe
• Converting Excel file with multiple sheets into multiple csv files using Jupyter notebook