F5-SDK How can I iterate a list of hosts with ManagementRoot(hostname)

with open("f5devices.txt") as file:
    stuff = file.read().splitlines()
    for thing in stuff:
        print(thing)
        b = ManagementRoot(thing, 'admin', 'admin', token=False)
        print(b.tmos_version)
        u = b.tm.auth.users.get_collection()
        for usr in u:
            print(usr.name)
        delusr_lst = ["meh", "yew", "kittie"]
        for delusr in delusr_lst:
             if b.tm.auth.users.user.exists(name=delusr):
                   print(delusr + " exists on system...deleting now!")
                   rmusr = b.tm.auth.users.user.load(name=delusr)
                   rmusr.delete()
             else:
                   print(" no user " + delusr + " on system...skipping!")
        p = b.tm.auth.users.get_collection()
        for usr in p:
            print(usr.name)