python manually finish writing file

Question

I have a program which receive a file.BIN from socket TCP/IP but I don't know how to exit the writing loop

Here is a piece of my code:

    with open(f"recv_{FILENAME}", "wb") as f:
        while True:
            data = client_tcp.recv(1024)
            if not data:
                break
            else:
                f.write(data)
                print("Data receiving")
                if 
                #I want to go out the loop here if the file is completely received                
        print("File Received")

Hope to get help from everybody. Many thanks