Which change to the script's first line fixes the import error?

The correct option, from ncclient import , resolves the import error by importing all public names (functions, classes, variables) from the ncclient module directly into the current namespace. This allows you to use manager (a common class within ncclient for managing Netconf sessions) without explicitly referencing ncclient.manager. from ncclient import is incomplete and will cause a syntax error. import manager would only work if manager were a top-level module, which it isn't in this context; it's part of the ncclient package. import ncclient manager is also syntactically incorrect for importing multiple items from a package.