old_contents: """Generic builder."""
  
  from regolith.helpers import hellohelper as hello
  from regolith.helpers import a_proprevhelper as a_proprev
  from regolith.helpers import a_grppub_readlisthelper as a_gprl
  from regolith.helpers import a_projectumhelper as a_projectum
  from regolith.helpers import l_milestoneshelper as l_milestone
  from regolith.helpers import l_projectahelper as l_projecta
  from regolith.helpers import l_grantshelper as l_grants
  from regolith.helpers import l_membershelper as l_members
  from regolith.helpers import l_contactshelper as l_contacts
  from regolith.helpers import u_logurlhelper as u_logurl
  
  HELPERS = {
      "hello": (hello.HelloHelper, hello.subparser),
      "a_proprev": (a_proprev.PropRevAdderHelper, a_proprev.subparser),
      "a_grppub_readlist": (a_gprl.GrpPubReadListAdderHelper, a_gprl.subparser),
      "a_projectum": (a_projectum.ProjectumAdderHelper, a_projectum.subparser),
      "l_milestones": (l_milestone.MilestonesListerHelper, l_milestone.subparser),
      "l_projecta": (l_projecta.ProjectaListerHelper, l_projecta.subparser),
      "l_grants": (l_grants.GrantsListerHelper, l_grants.subparser),
      "l_members": (l_members.MembersListerHelper, l_members.subparser),
      "l_contacts": (l_contacts.ContactsListerHelper, l_contacts.subparser),
      "u_logurl": (u_logurl.LogUrlUpdaterHelper, u_logurl.subparser)
      "u_contact": (u_contact.ContactUpdaterHelper, u_contact.subparser),
  }
  
  
  def helpr(btype, rc):
      """Returns helper of the appropriate type."""
      return HELPERS[btype][0](rc)
  
new_contents: """Generic builder."""
  
  from regolith.helpers import hellohelper as hello
  from regolith.helpers import a_proprevhelper as a_proprev
  from regolith.helpers import a_grppub_readlisthelper as a_gprl
  from regolith.helpers import a_projectumhelper as a_projectum
  from regolith.helpers import l_milestoneshelper as l_milestone
  from regolith.helpers import l_projectahelper as l_projecta
  from regolith.helpers import l_grantshelper as l_grants
  from regolith.helpers import l_membershelper as l_members
  from regolith.helpers import l_contactshelper as l_contacts
  from regolith.helpers import u_logurlhelper as u_logurl
  
  HELPERS = {
      "hello": (hello.HelloHelper, hello.subparser),
      "a_proprev": (a_proprev.PropRevAdderHelper, a_proprev.subparser),
      "a_grppub_readlist": (a_gprl.GrpPubReadListAdderHelper, a_gprl.subparser),
      "a_projectum": (a_projectum.ProjectumAdderHelper, a_projectum.subparser),
      "l_milestones": (l_milestone.MilestonesListerHelper, l_milestone.subparser),
      "l_projecta": (l_projecta.ProjectaListerHelper, l_projecta.subparser),
      "l_grants": (l_grants.GrantsListerHelper, l_grants.subparser),
      "l_members": (l_members.MembersListerHelper, l_members.subparser),
      "l_contacts": (l_contacts.ContactsListerHelper, l_contacts.subparser),
      "u_logurl": (u_logurl.LogUrlUpdaterHelper, u_logurl.subparser),
  }
  
  
  def helpr(btype, rc):
      """Returns helper of the appropriate type."""
      return HELPERS[btype][0](rc)
  
subject: Update helper.py