importing is failed about parsedatetime HOT 2 CLOSED

$ virtualenv -p python2.7 env
$ . env/bin/activate
$ pip install parsedatetime==2.6
$ python
Python 2.7.17 (default, Jan 19 2020, 19:54:54) 
[GCC 9.2.1 20200110] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import parsedatetime.pdt_locales.icu as i
>>> i
<module 'parsedatetime.pdt_locales.icu' from '/home/tonyg/q/env/local/lib/python2.7/site-packages/parsedatetime/pdt_locales/icu.pyc'>
>>> i.pyicu
<module 'parsedatetime.pdt_locales.icu' from '/home/tonyg/q/env/local/lib/python2.7/site-packages/parsedatetime/pdt_locales/icu.pyc'>
>>>