input: Write a python function to return the real and imaginary parts of a complex number.
  assert get_real_imaginary(complex(2, 3)) == (2.0, 3.0)
  assert get_real_imaginary(complex(0, -1)) == (0.0, -1.0)
  assert get_real_imaginary(complex(-5, 4)) == (-5.0, 4.0)
output: def get_real_imaginary(c):
      return c.real, c.imag