Jodie Foster plays a self-assured psychoanalyst whose composure unravels after a patient unexpectedly dies in the genre-bending French film “A Private Life.”Rebecca Zlotowski’s latest is part noir, part comedy of remarriage, and part Freudian fever dream about past lives. And anchoring it all is Foster, using the full force of her star power and impeccable French to make “A Private Life,” unwieldy and complex as it is, go down as easy as a glass of gamay. In other words, there’s a lot going on in “A Private Life,” which Zlotowski co-wrote with Anne Berest. “A Private Life” is ultimately Foster’s show anyway and she seems to relish the tricky assignment. (“A Private Life” contains language, graphic nudity, brief violence, some sexual content)‘A PRIVATE LIFE’Rated R. At the AMC Boston Common, Coolidge Corner Theatre and suburban theaters.