[Solved] Python: TypeError: ‘float’ object is not subscriptable
def get_data(fp):
data = []
for line in fp:
line_list_ints = [int(number) for number in line.split()]
data.append(line_list_ints)
return data
def calculate_grades(data):
for line in data:
total_points = sum(line[1:6])
grade = get_grade(total_points)
data.insert(0,total_points)
data.insert(1,grade)
return data
I am getting the TypeError: ‘float’ object is not subscriptable for line 10. I do not understand why as I convert the numbers into ints before I append them into the data list. Can anyone help? Am I being clear enough?
The issue is that you’re modifying the data list while you’re iterating over it, using data.insert in calculate_grades. This leads to the second iteration of the loop to see the grade value from the previous iteration as line, rather than the list of integers it is expecting.
I don’t entirely understand what you’re trying to do, so I can’t suggest a solution directly.
Perhaps you should make a separate list for the output, or modify line in place, rather than inserting a new item into data.
The specific problem is because there are floats in data (eventually)
for line in data:
total_points = sum(line[1:6])
grade = get_grade(total_points)
data.insert(0,total_points)
data.insert(1,grade)
Because you insert it into your list, as ‘grade’
The general problem is that you are modifying your list (‘data’) while you iterate over it, which is a bad idea – your logic will be hard to read at best, and easily loop forever.
Uh, the issue is the part line[1:6] in line 10. The variable line is a float, so you can’t take a sublist.