I have entered the following code in the editor

math_marks_A = []
for line in open("student_record.txt"):
    fields = line.split(";")
    region_code = fields[0]
    region_code_stripped = region_code.strip()
    math_mark_str = fields[5]
    math_mark = float(math_mark_str)
    if region_code == "A":
        math_marks_A.append(math_mark)

but i am getting the following error after running the file

Traceback (most recent call last):
  File "/home/ranjeet/Desktop/python_plot/marks.py", line 6, in <module>
    math_mark_str = fields[5]
IndexError: list index out of range