Which film is the true story of a concert pianist's life in Nazi occupied Warsaw during WW II?

The 2002 film which is the true story of a concert pianist's life in Nazi-occupied Warsaw during WW II is "The Pianist". In this adaptation of the autobiography 'The Pianist: The Extraordinary True Story of One Man's Survival in Warsaw, 1939-1945', Wladyslaw Szpilman (Adrien Brody), a Polish Jewish radio station pianist, sees Warsaw change gradually as World War II begins. Szpilman is forced into the Warsaw Ghetto but is later separated from his family during Operation Reinhard. After he is separated, until the concentration camp prisoners are released, Szpilman hides in various locations among the ruins of Warsaw.

"The Pianist" is a biographical war drama that was produced and directed by Roman Polanski. The film's script was written by Ronald Harwood. The film was a co-production of France, the United Kingdom, Germany, and Poland. Besides starring Brody, its main cast includes Thomas Kretschmann as Captain Wilm Hosenfeld, Frank Finlay as Samuel Szpilman, Maureen Lipman as Edwarda Szpilman, Emilia Fox as Dorota, Ed Stoppard as Henryk Szpilman, and Michał Żebrowski as Jurek.

The film met with significant critical praise and received multiple awards and nominations. It was awarded the Palme d'Or at the 2002 Cannes Film Festival and at the 75th Academy Awards, the film won Oscars for Best Director (Roman Polanski), Best Adapted Screenplay (Ronald Harwood), and Best Actor (Adrien Brody). It was nominated for 4 other awards, including the Academy Award for Best Picture.