I am removing J1 from J. Corresponding to the removed indices, I want to alter Ci[1] and append to Ci as shown below but I am getting an error. I also present the expected output.

J=[2, 6, 9, 10]
J1=[6,10]
l=[]
l.append(J)
l.append([x for x in J if x not in J1])

Ci = [[0, 0, 0, 0], [10, 30, 50, 80]]
A=Ci[1]([x for x in J if x not in J1])
print(A)

The error is

in <module>
    A=Ci[1]([x for x in J if x not in J1])

TypeError: 'list' object is not callable

The expected output is

[[[0, 0, 0, 0], [10, 30, 50, 80]],[[10, 50]]]

>Solution :

You can collect the indices first,

lidx = [i for i in range(len(J)) if J[i] not in J1]
A = [Ci, [Ci[1][i] for i in lidx]]