$ pycardsyncer -c pycard.conf -a private --debug
DEBUG:root:Using configuration from pycard.conf
DEBUG:root:Ignoring query:where in configuration file
DEBUG:root:Ignoring default:debug in configuration file
DEBUG:root:Using configuration:
DEBUG:root: accounts:
DEBUG:root: auth: basic
DEBUG:root: name: work
DEBUG:root: resource: https://carddav.server.tld:443/davical/caldav.php/username/addresses/
DEBUG:root: user: username
DEBUG:root: verify: True
DEBUG:root: write_support: False
DEBUG:root: accounts:
DEBUG:root: auth: digest
DEBUG:root: name: private
DEBUG:root: resource: https://contacts.icloud.com/
DEBUG:root: user: myname
DEBUG:root: verify: True
DEBUG:root: write_support: False
DEBUG:root: debug: True
DEBUG:root: filename: pycard.conf
DEBUG:root: sqlite:
DEBUG:root: path: ./abook.db
DEBUG:root: sync:
DEBUG:root: accounts: set(['private'])
DEBUG:root:start syncing account private
DEBUG:root:made sure version table exists
DEBUG:root:made sure accounts table exists
DEBUG:root:made sure private table exists
DEBUG:root:looking for locally changed vcards...

And nothing else...