Zip

import py7zlib

filename = 'what_am_i_bd6788043be8300f6f5ed298be42ed91'
while True:
        f = py7zlib.Archive7z(open(filename, 'rb'))
        password = f.getnames()[0]
        f = py7zlib.Archive7z(open(filename, 'rb'), password)
        open(password,'wb').write(f.getmember(password).read())
        filename = password
        print filename
        if filename == 'flag':
                print 'Flag:', open('flag', 'r').read()
                break

#Flag: matesctf{fin@11y_y0u_f0und_my_n@m3!}