micropython/tests/float/float_array.py

from array import array

def test(a):
    print(a)
    a.append(1.2)
    print(len(a), '%.3f' % a[0])
    a.append(1)
    a.append(False)
    print(len(a), '%.3f %.3f' % (a[1], a[2]))
    a[-1] = 3.45
    print('%.3f' % a[-1])

test(array('f'))
test(array('d'))