DSM questions

DSM answers

• How do I insert a column after the first column in a CSV and then populate it with a single value?
• Is there a way to set random state for all pandas function?
• Drop duplicates in pandas time series dataframe
• How to get ordered set? [duplicate]
• pandas: Better way to update and merge dataframes
• how to add new value in front of each elements in a list?
• index and column for the max value in pandas dataframe
• numpy piecewise function claiming lists are not same size
• How do I get the looping index when using Python zip-function?
• Satisfying a Condition Among List of Lists of Arbitrary Length