the "-u" argument

[Martin von Loewis]

Felix <bfg10k at 21cn.com> writes:

> when i use "python -u" to start the interpreter, every time i hit "ENTER"
>  the interpreter always produce an error message like below.
> 
> >>>
>   File "<stdin>", line 1
> 
>     ^
> SyntaxError: invalid syntax
> 
> but i didn't type any statement (thus there can't be any SyntaxError).
> 
> does anybody know why this happens?

My guess is this is because of the CR character that is send as part
of the CRLF sequence. Without -u, the C library translates CRLF to LF,
which is acceptable; if the CR remains, it is an error.

Regards,
Martin