Home Original page

[Python-Dev] eval and triple quoted strings

PJ Eby pje at telecommunity.com
Fri Jun 14 23:03:14 CEST 2013 
On Fri, Jun 14, 2013 at 2:11 PM, Ron Adam <ron3200 at gmail.com> wrote:
>
>
> On 06/14/2013 10:36 AM, Guido van Rossum wrote:
>>
>> Not a bug. The same is done for file input -- CRLF is changed to LF before
>> tokenizing.
>
>
>
> Should this be the same?
>
>
> python3 -c 'print(bytes("""\r\n""", "utf8"))'
> b'\r\n'
>
>
>>>> eval('print(bytes("""\r\n""", "utf8"))')
> b'\n'

No, but:

eval(r'print(bytes("""\r\n""", "utf8"))')

should be.  (And is.)

What I believe you and Walter are missing is that the \r\n in the eval
strings are converted early if you don't make the enclosing string
raw.  So what you're eval-ing is not what you think you are eval-ing,
hence the confusion.
More information about the Python-Dev mailing list