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students = [['alice', [75,80,85,90]], ['bob',[60,65,70,75]],['charlie',[90,85,80,78]]]
def calculate_mean(name):
for i in students:
if i[0] == name:
mean = sum(i[1]) / len(i[1])
return mean
return "not in list"
def top_student():
top = 0
for i in students:
this_student_mean = calculate_mean(i[0])
if this_student_mean > top:
top = this_student_mean
for i in students:
if calculate_mean(i[0]) == top:
return i[0]
def grade_spread():
prev = 0
current = 50
count = 0
for x in range(6):
for i in students:
for j in i[1]:
if j <= current:
count = count + 1
print(f"{prev} - {current}: {count}")
prev = current
current = current + 10
def improvement(name):
for i in students:
if i[0] == name:
low = i[1][0]
high = 0
for i in i[1]:
if i < low:
low = i
elif i > high:
high = i
range = high - low
return range
return "not in list"
print(f"mean for charle: {calculate_mean('charlie')}")
print(f"the top student is: {top_student()}")
print("the grade spread is")
grade_spread()
print(f"the grade improvement of alice is: {improvement('alice')}")
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