[Python-Dev] Incorrect behavior in str.format() method when padding with '\x00'

[Eric V. Smith]

On 04/02/2014 04:08 PM, John Tyree wrote:
> 
> Hi all,
> 
> Is there any particularly reason for the following behavior on both
> 2.7.6 and 3.4.0 ?
> 
>     >>> "{:\x00<5}".format(2)
>     '2    '
>     >>>
>     "{:\x20<5}".format(2)                                                                                                
> 
>     '2    '
>     >>>
>     "{:\x01<5}".format(2)                                                                                                
> 
>     '2\x01\x01\x01\x01'
>     >>> "{:\x00<5}".format(2) ==
>     "{:\x20<5}".format(2)                                                                       
> 
>     True
> 
> 
> The docs say "If a valid /align/ value is specified, it can be preceded
> by a /fill/ character that can be any character and defaults to a space
> if omitted," so I'm inclined to call this a good old fashioned bug.

I'd say it's a bug. Please open a bug, assign it to me (eric.smith), and
I'll comment on it there.

Eric.