Mr. Hubbard has re-written the demo to eliminate cURL. The newest version is on the python pypi repository (https://pypi.python.org/pypi/dlipower/)
The source is on github (https://github.com/dwighthubbard/python-dlipower)

Thanks again, Dwight.

Hammock  (Best for WiFI capable controllers)

For those interested only in the WiFi capable power controllers, Hammock https://github.com/kadirpekel/hammock/ is quite
sufficient to obtain a convenient REST API interface.
Sample code:

from hammock import Hammock
from requests.auth import HTTPDigestAuth
import time

auth = HTTPDigestAuth('admin', '1234')
pcr=Hammock("http://192.168.0.100/restapi",append_slash=True,auth=auth,headers={'X-CSRF': 'x'})

print (pcr.auth.users.GET().json())
# [{u'outlet_access': [True, True, True, True, True, True, True, True], u'password': {u'$ref': u'0/password/'}, u'is_allowed': True, u'is_admin': True, u'name': u'admin'}]

print (pcr.auth.users(0).outlet_access.GET().json())
# [True, True, True, True, True, True, True, True]

# Outlets/Relays are zero indexed in the REST API (0-7)
pcr.relay.outlets(0).state.PUT(json=True) # Relay 0 switches on
time.sleep(5)   

outlets=pcr.relay.outlets
# Relay 1 starts switching on
for i in range(1,7):
    outlets(i).state.PUT(json=True)  # outlets 1-7 switch on
    
time.sleep(7)   

for i in range(8):
    outlets(i).state.PUT(json=False)  # all outlets switch off
    
print (pcr.auth.users("is_admin=true").name.GET().json())
# admin