##
12.20.1 netrc Objects

A `netrc` instance has the following methods:

`authenticators` (host)
  Return a 3-tuple `(login, account, password)`of authenticators for host. If the netrc file did not contain an entry for the given host, return the tuple associated with the `default' entry. If neither matching host nor default entry is available, return `None`.

`__repr__` (host)
  Dump the class data as a string in the format of a netrc file. (This discards comments and may reorder the entries.)

Instances of `netrc` have public instance variables:

`hosts`
  Dictionmary mapping host names to `(login, account, password)` tuples. The `default' entry, if any, is represented as a pseudo-host by that name.

`macros`
  Dictionary mapping macro names to string lists.