Cannot PyDatetimeConverter(Eastern)

Following the docstring of matplotlib.dates, I tried the following
commands, but failed. It says there is no argument needed when
constructing PyDatetimeConverter object.
If it is true, how about correcting it right away because the document
is only one explaining its usage?

Python 2.3.3 (#2, Feb 17 2004, 11:45:40)
Type "copyright", "credits" or "license" for more information.

IPython 0.6.1.rc1 -- An enhanced Interactive Python.
? -> Introduction to IPython's features.
@magic -> Information about IPython's 'magic' @ functions.
help -> Python's own help system.
object? -> Details about 'object'. ?object also works, ?? prints more.

In [1]: from matplotlib.dates import PyDatetimeConverter
In [3]: from matplotlib.dates import Eastern
In [4]: converter=PyDatetimeConverter(Eastern)

ยทยทยท

---------------------------------------------------------------------------
TypeError Traceback (most recent call
last)

/home/sdhyok/catchlab/catchlab/catchlab/pkg/rhessys/test/<console>

TypeError: this constructor takes no arguments

--
Daehyok Shin (Peter)
Geography Department
Univ. of North Carolina-Chapel Hill