```
grades = [100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5]
def print_grades(grades_input):
for grade in grades_input:
print grade
def grades_sum(scores):
total = 0
for score in scores:
total += score
return total
def grades_average(grades_input):
sum_of_grades = grades_sum(grades_input)
average = sum_of_grades / float(len(grades_input))
return average
def grades_variance(scores):
average = grades_average(scores)
variance = 0
for score in scores:
variance += (average-score) ** 2
result = variance/(len(scores))
return result
print grades_average(grades)
```

I tried this code but again getting the same error.

```
grades = [100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5]
def print_grades(grades_input):
for grade in grades_input:
print grade
def grades_sum(scores):
total = 0
for score in scores:
total += score
return total
def grades_average(grades_input):
sum_of_grades = grades_sum(grades_input)
average = sum_of_grades / float(len(grades_input))
return average
```

But if I try the below code,

```
def grades_variance(scores):
average = grades_average(scores)
variance = 0
for score in scores:
variance += (average-score) ** 2
result = variance/(len(scores))
return result
print grades_average(grades)
```

ERROR: File “python”, line 23

result = variance/(len(scores))

^

IndentationError: unexpected indent

Please let me know what I can improve here? I tried every permutation.