Fix Python – How to document a method with parameter(s)?

How to document methods with parameters using Python’s documentation strings?
PEP 257 gives this example:
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