# test ffi float support import ffi def ffi_open(names): err = None for n in names: try: mod = ffi.open(n) return mod except OSError as e: err = e raise err libc = ffi_open(('libc.so', 'libc.so.0', 'libc.so.6')) strtof = libc.func("f", "strtof", "sp") print('%.6f' % strtof('1.23', None)) strtod = libc.func("d", "strtod", "sp") print('%.6f' % strtod('1.23', None))