data = pd.read_csv("filename.txt", sep=",t")

This line of code reads in a file called "filename.txt" using pandas library's read_csv function. The separator used in the file is ",t" (comma and the letter t), which means that the file is expected to have comma-separated values with a tab character (represented by "\t" in Python) at the end of each line.

However, it is more likely that the intended separator is just "\t" (tab character), so the correct code would be:

data = pd.read_csv("filename.txt", sep="\t")