def main():
print(sample.N)
print(sample.square_float(2))
print(sample.reverse([1, 2, 3]))
hz = sample.Hz()
hz.a = 1
hz.b = 'b'
hz2 = sample.Hz(hz)
hz.a = 2
print(hz, hz2)
def main():
print(sample.N)
print(sample.square_float(2))
print(sample.reverse([1, 2, 3]))
hz = sample.Hz()
hz.a = 1
hz.b = 'b'
hz2 = sample.Hz(hz)
hz.a = 2
print(hz, hz2)
