Jack questions

• create new column that telling the values why they are not selected on pandas?
• Insert data and fill columns with rank
• divide group data base on select columns values?
• Remove rows that two columns have the same values by pandas
• How to extract sklearn decision tree rules to pandas boolean conditions?
• How to calculate time difference by group using pandas?
• How to create dummies for certain columns with pandas.get_dummies()

Jack answers