def kos\_root():
  ~ """Return the pathname of the KOS root directory.""" global
    \_kos\_root if \_kos\_root: return \_kos\_root ...

def complex(real=0.0, imag=0.0):
  ~ """Form a complex number.

    Keyword arguments: real -- the real part (default 0.0) imag -- the
    imaginary part (default 0.0)

    """ if imag == 0.0 and real == 0.0: return complex\_zero ...