I want to store value 0.2 in my 778 arrays. but the result shows "none" as the values. 

What I want to do:
[0.2,0.2,0.2] for 778

[None,
 None,
 None,
 None,
 None,
 None,
 None,
 None,
 None,
 None,
 None,
 None....]

```
weight=[]
i=0
while i <=777:
    value=0.2
    weight[i]= weight.append(value)
    i=i+1
weight

```

expected results:
[0.2,0.2,0.2,0.2]~~~~ until 778 iteration