Insert in a list random of 0 and 1 with a certain number of 1's

Question

How do I generate a list of length N with random 0 and 1 values , but with a given number of 1\'s put randomly in the list.

For example, I want a list of 10

Answer 1

Using numpy

import numpy as np
from random import shuffle
A = np.ones(7, dtype=np.int)          // [1 1 1 1 1 1 1] and data-type as integer
B = np.zeros(3, dtype=np.int)         // [0 0 0] and data-type as integer
C = np.concatenate((A, B), axis = 0)  // [1 1 1 1 1 1 1 0 0 0]
shuffle(C)                            // [1 0 0 1 1 1 1 0 1 1]
print C