Add the following aliases:

• spec -> filter
• fields -> projection
• timeout -> no_cursor_timeout
• partial -> allow_partial_results

Add the following new options:

• cursor_type
• oplog_replay
• modifiers

With the exception of oplog_replay, all of these new parameters will be set to None by default. If a value for any of them is provided, the following rules apply:

A value for filter will take precedence over spec.
A value for projection will take precedence over fields.
A value for no_cursor_timeout will take precedence over timeout.
A value for allow_partial_results will take precedence over partial.
A value for cursor_type will take precedence over tailable, await_data, and exhaust.
A value for modifiers will be used as the basis for adding modifiers to the query filter. If $snapshot or $maxScan are passed in modifiers, they will take precedence over the snapshot and max_scan options.

Note that this should likely be enforced in pymongo.cursor.Cursor, so the the aliased options are automatically available in Collection.find_one, and can be trivially added to GridFS.find() and GridFS.find_one().