Get label from selection

gistfile1.xml

<plominodatabase id="pooldb">
  <design>
    <resource id="libConfig" title="" type="Script (Python)"><![CDATA[## Script (Python) "libConfig"
##bind container=container
##bind context=context
##bind namespace=
##bind script=script
##bind subpath=traverse_subpath
##parameters=
##title=
##
db = plominoContext.getParentDatabase()

config = db.getDocument('configuration')
frmConfig = db.getForm('frmConfiguration')
separator = '|'

def libConfig_getSelectionList(key):
    """ Get the selection list for this field.
    """
    selection_list = []
    form_field = frmConfig.getFormField(key)
    if form_field:
        selection_list = form_field.getSettings().getSelectionList(config)
    return selection_list

def libConfig_getValuesAsDict(key):
    """ Look up a config value by name, return the value as a dictionary, splitting each line on `separator`.
    """
    selection_list = libConfig_getSelectionList(key)
    d = {}
    for row in selection_list:
        (label, selection_key) = row.split(separator)
        d[selection_key] = label
    return d

def libConfig_getLabelFromDict(key, value):
    """ Look up a config value by name, return the label by given value searched in the dictionary.
    """
    selection_list = libConfig_getSelectionList(key)
    empty_label = ''
    for row in selection_list:
        (label, selection_key) = row.split(separator)
        if selection_key == value:
            return label
    return empty_label

]]></resource>
  </design>
</plominodatabase>