Organizing the output of 2 for loops

[pythoneer]

I have 2 for loops that fetch data from 2 different data sources, one for loop prints an output of 15 rows and 6 columns and another for loop prints an output of 18 rows and 6 columns like below , sample output

For loop 1 output:

For loop 2 output:


i want them to be combined and organised in such a way that they are sorted based on column 6 with the column1 of for loop 1's output is fixed as follows,


How can i organize the output from these 2 for loops to create this output. i am not sure where to start, however i tried creating individual lists by appending the output that i get from the for loop and it throws an error that it can accept only one argument as below

 io = []
    for obj in hearts:            
        rawvalue = obj.raw - readvalue
        if rawvalue < 0:
            rawvalue = rawvalue + 440
        else:
            rawvalue
        obj = str(obj)
        obj = ((obj.strip('<').split(" ")[0]))
        io.append(obj, viewdata(rawvalue)[0][3],viewdata(rawvalue)[0][0], viewdata(rawvalue)[0][1], viewdata(rawvalue)[0][2],rawvalue)

TypeError: append() takes exactly one argument (6 given)

What should be done to make this work