why i can't read sda1 with python?

[Xia]

#ls -l /dev/sda1
will print
brw-r----- 1 root disk ...
so only root or accounts in group disk can access /dev/sda1,
you could add the account into group disk with usermod, then re-login.

On Sat, 2 Jun 2012 10:14:36 +0800
"水静流深" <1248283536 at qq.com> wrote:

> tiger at debian:~$ sudo  fdisk  -l
> 
> Disk /dev/sda: 120.0 GB, 120034123776 bytes
> 255 heads, 63 sectors/track, 14593 cylinders
> Units = cylinders of 16065 * 512 = 8225280 bytes
> Sector size (logical/physical): 512 bytes / 512 bytes
> I/O size (minimum/optimal): 512 bytes / 512 bytes
> Disk identifier: 0x073a3c87
> 
>    Device Boot      Start         End      Blocks   Id  System
> /dev/sda1   *           1        1912    15358108+   c  W95 FAT32 (LBA)
> /dev/sda2            1913        3736    14647296    b  W95 FAT32
> /dev/sda3            3736        3979     1952768   83  Linux
> /dev/sda4            3979       14594    85260289    5  Extended
> /dev/sda5            3979        4040      487424   83  Linux
> /dev/sda6            4040        4769     5858304   83  Linux
> /dev/sda7            4770        4891      975872   83  Linux
> /dev/sda8            4891        5134     1951744   83  Linux
> /dev/sda9            5134       14374    74217472   83  Linux
> /dev/sda10          14374       14594     1764352   82  Linux swap / Solaris
> 
> i want to read  sda1  with python:
> >>> file=open('/dev/sda1','rb')
> Traceback (most recent call last):
>   File "<stdin>", line 1, in <module>
> IOError: [Errno 13] Permission denied: '/dev/sda1'
> 
> how can i own the access to read sda1?