Why I can't complete my Project?

Question

I have almost complete a course but the project containing in it is not running well while it's correct.
Someone should help and fixed the problem for me please.
Below is the code
Course: Pyhton
Project: Basketball players

https://code.sololearn.com/ctJSEZmfLgHt/?ref=appmean = sum(players)/len(players)
v = [(i - mean)**2 for i in players]
variance = sum(v)/len(players)
sd = variance ** 0.5
print(sd)
new_list = []
for i in players:
if i > mean - sd and i < mean + sd:
new_list.append(i)
print(new_list)
print(len(new_list))

Answer 1

#create new list array to get number of players in mean-std and mean+std
list=[]

#mean
mean=sum(players)/len(players)

#variance
x=[(i**2) for i in players]
var=(1/len(players))*(sum(x))-mean**2

#Standard Deviation
std=var**0.5

x,y=(int(mean-std),int(mean+std))

for i in players :
if i>x and i<y :
list.append(i)

#len
print(len(list))

Answer 2

Can you explain what you mean by "not running Well"

Answer 3

Is not running the way it's