Add Plone Members Programmatically, Tested on Plone 4.3.3. Prepare Your Own member.csv, and Run bin/plonectl run regBatch.py

getMember.py

from Products.CMFCore.utils import getToolByName
membership = getToolByName(app.mysite, 'portal_membership')
for member in membership.listMembers():
    print member.getProperty('id'), member.getProperty('fullname'), member.getProperty('email')

member.csv

regBatch.py

from Testing import makerequest
root = makerequest.makerequest(app)
site = root.mysite
admin = root.acl_users.getUserById('admin')
admin = admin.__of__(site.acl_users)

from AccessControl.SecurityManagement import newSecurityManager
newSecurityManager(None, admin)

#from zope.site.hooks import setHooks
from zope.site.hooks import setSite
#setHooks()
#site.setupCurrentSkin(site.REQUEST)
setSite(site)

from Products.CMFCore.utils import getToolByName
regtool = getToolByName(site, 'portal_registration')
#username = 'testuser'
#password = 'topsecret'
#properties = {'username': username, 'fullname': 'Test User', 'email': 'testuser@gmail.com'}
import csv
with open('member.csv', 'rb') as f:
    f.seek(0)
    reader = csv.reader(f)
    for row in reader:
        #member = regtool.addMember(username, password, properties=properties)
        member = regtool.addMember(row[0], row[1], properties={'username': row[0], 'fullname': row[2], 'email': row[3]})

import transaction
transaction.commit()