with open(input_file) as f_in:
    lines = f_in.readlines()
data = np.genfromtxt(lines[2::4], dtype=None, delimiter=',')
low = np.genfromtxt(lines[3::4], dtype=str)
up = np.genfromtxt(lines[4::4], dtype=str)
Using multiple genfromtxt on a single file