import sys, cffi if sys.version_info < (3,): u_prefix = "u" else: u_prefix = "" unichr = chr ffi = cffi.FFI() ffi.embedding_api(u""" int add1(int, int); """) ffi.embedding_init_code((""" import sys, time for c in %s'""" + unichr(0x00ff) + unichr(0x1234) + unichr(0xfedc) + """': sys.stdout.write(str(ord(c)) + '\\n') sys.stdout.flush() """) % u_prefix) ffi.set_source("_withunicode_cffi", """ """) fn = ffi.compile(verbose=True) print('FILENAME: %s' % (fn,))