use pandas"s read_csv to read a dataset
import pandas as pddfoff = pd.read_csv (xxx.csv", keep_default_na=False)
pd.set_option ("display.max_columns", None)
print (dfoff.head (3))
found that he has 6 columns of data
"User_id"
print(dfoff["User_id"])
User_idMerchant_id?