I would like to programmatically enable/disable LDAP user accounts. From the command prompt I can use dsutil and this apparently sets/removes the nsAccountLock operational attr
You should use the attribute 'userAccountControl' which contains a set of control bits.
If you are managing normal users, to enable user:
userAccountControl = 512
and to disable it:
userAccountControl = 514
Generally, if you want to enable/disable an existing user, you should retrieve current value and update it this way.
userADAccountControlFlag = 2
userAccountControl = user.userAccountControl
# To enable user:
userAccountControl = userAccountControl & ~userADAccountControlFlag # (& bit-wise AND, ~ bit-wise Negate)
# To disable user:
userAccountControl = userAccountControl | userADAccountControlFlag # (| bit-wise OR)
user.userAccountControl = userAccountControl
# Then update user on ldap server
you can find more about userAccountControl attribute here: http://www.selfadsi.org/ads-attributes/user-userAccountControl.htm