```
grades = [100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5]
def print_grades(grades):
for grade in grades:
print(grade)
def grades_sum(grades):
total = 0
for grade in grades:
total += grade
return total
def grades_average(grades):
sum_of_grades = grades_sum(grades)
average = sum_of_grades / float(len(grades))
return average
def grades_variance(scores):
average = grades_average(scores)
variance = 0
for score in scores:
variance += (average - score) ** 2
p = variance / (len(scores))
return p
#print(grades_variance(grades))
def grades_std_deviation(variance):
return variance ** 0.5
variance = grades_variance(grades)
def print_all(grades):
print(grades)
print(grades_sum(grades))
print(grades_average(grades))
print(grades_variance(grades))
print(grades_std_deviation(variance))
print_all(grades)
```

# Stuck in review

**hshuriye**#1

**bayoishola20**#2

The issue should be here:

The function name here

is *print_grades*. Call it and print it. Like this:

`print print_grades(grades)`

I hope this helps!

**hshuriye**#3

I have updated, but still getting "Oops, try again. It looks like not all grades were printed! Make sure you are printing ech one on their own line." the output is here:

100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5]

1045.5

80.4230769231

334.071005917

18.2776094147

None

I can't pass through this stage.

**hshuriye**#5

grades = [100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5]

def print_grades(grades):

for grade in grades:

return grades

def grades_sum(grades):

total = 0

for grade in grades:

total += grade

return total

def grades_average(grades):

sum_of_grades = grades_sum(grades)

average = sum_of_grades / float(len(grades))

return average

def grades_variance(scores):

average = grades_average(scores)

variance = 0

for score in scores:

variance += (average - score) ** 2

p = variance / (len(scores))

return p

def grades_std_deviation(variance):

return variance ** 0.5

variance = grades_variance(grades)

print(print_grades(grades))

print(grades_sum(grades))

print(grades_average(grades))

print(grades_variance(grades))

print(grades_std_deviation(variance))

**bayoishola20**#6

You removed the print_all function? **It doesn't matter**

Okay, see this loop.

You should **return grade** and not **return grades** as you have it.

**hshuriye**#8

```
grades = [100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5]
def print_grades(grade):
for grade in grades:
return grades
def grades_sum(grades):
total = 0
for grade in grades:
total += grade
return total
def grades_average(grades):
sum_of_grades = grades_sum(grades)
average = sum_of_grades / float(len(grades))
return average
def grades_variance(scores):
average = grades_average(scores)
variance = 0
for score in scores:
variance += (average - score) ** 2
p = variance / (len(scores))
return p
def grades_std_deviation(variance):
return variance ** 0.5
variance = grades_variance(grades)
print(print_grades(grades))
print(grades_sum(grades))
print(grades_average(grades))
print(grades_variance(grades))
print(grades_std_deviation(variance))
```

[100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5]

1045.5

80.4230769231

334.071005917

18.2776094147

None

every print call in one line, but the site interpreter says otherwise. please help.

**bayoishola20**#9

No, you didn't do as suggested.

Replace with

```
def print_grades(grades):
for grade in grades:
return grade
```

**hshuriye**#10

Thanks, I have done the changes you suggested:

def print_grades(grades): for grade in grades: return grade

The code:

grades = [100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5] def

print_grades(grades): for grade in grades: return grade def

grades_sum(grades): total = 0 for grade in grades: total += grade return

total def grades_average(grades): sum_of_grades = grades_sum(grades)

average = sum_of_grades / float(len(grades)) return average def

grades_variance(scores): average = grades_average(scores) variance = 0 for

score in scores: variance += (average - score) ** 2 p = variance /

(len(scores)) return p def grades_std_deviation(variance): return variance

** 0.5 variance = grades_variance(grades) print(print_grades(grades))

print(grades_sum(grades)) print(grades_average(grades))

print(grades_variance(grades)) print(grades_std_deviation(variance))

but still there are ERRORS -*Oops, try again.* It looks like not all grades were printed! Make sure you

are printing ech one on their own line.

**bayoishola20**#11

Okay, I will do a full recap and show you in full code because your last change reflected my last suggestion, but left out my first.

Please, see below.

```
grades = [100, 100, 90, 40, 80, 100, 85, 70, 90, 65, 90, 85, 50.5]
def print_grades(grades):
for grade in grades:
print grade #<----- Here
def grades_sum(grades):
total = 0
for grade in grades:
total += grade
return total
def grades_average(grades):
sum_of_grades = grades_sum(grades)
average = sum_of_grades / float(len(grades))
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_variance(grades)
def grades_std_deviation(variance):
return variance ** 0.5
variance = grades_variance(grades)
print print_grades(grades) #<------ Here
print grades_sum(grades)
print grades_average(grades)
print grades_variance(grades)
print grades_std_deviation(variance)
```

Please note that python is indentation sensitive and you should learn to format it on the forum for ease.

**systemcoder22323**#14

I try the same method it shows some error

Traceback (most recent call last):

File "python", line 40, in

File "python", line 30, in grades_std_deviation

TypeError: unsupported operand type(s) for ** or pow(): 'list' and 'float'

could u help in this matter?

**bayoishola20**#15

I see that you are having a TypeError as the logged by the error message. Do you mind copying and pasting your "well-formatted" code here?!

Thank you!

**system**#16

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