Taking elements from list after enumeration

Question

users = []
for t in enumerate(glob.glob('/Users/*/*_grounder.csv'), 1):
    for f in enumerate(glob.glob('/Users//*/*_pip.csv'), 1):
        if t != f:
            users.append((t, f)

With the code above I have a list with common numbers starting at 1 with this list I wish to take these CSV files from the list and make them into their own data frames OR merge them into one.

For example:

(1, file_grounder.csv), (1, file_pip,csv), 2, (etc,etc)

Takes the files with 1 in front of them and merge them from the list similar to how I globbed the folders for the files.