How can I partially fill a numpy array with a value given a range?

Given a numpy array, a range, and a value, how can I fill the array with the value inside the range?

Is there a way that is faster than filling it in manually with a loop one by one?

Edit:

myArray = np.zeros(10)

What I want: [0, 0, 0, 0, 1, 1, 1, 0, 0, 0]

arr = np.zeros(10)
arr[4:7] = 1
print(arr)

Output:

array([0., 0., 0., 0., 1., 1., 1., 0., 0., 0.])