Re: [Tutor] subprocess.call not formatting date

2014-07-08 Thread Bob Williams 
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

On 08/07/14 18:12, Peter Otten wrote:
> I suggest that you calculate the folder name in Python instead:
> 
> # untested name =
> datetime.datetime.now().strftime("%y-%m-%d_%H-%M") destpath =
> os.path.join("/home/bob/A3/docsnaps", name) subprocess.call( 
> ["btrfs", "subvolume", "snapshot", "/home/bob/A3/documents",
> destpath])

Thank you. That worked perfectly. Once it's pointed out it is obvious
to use the python solution, but my brain is becoming less agile as I
collect more birthdays!

Bob
- -- 
Bob Williams
System:  Linux 3.11.10-17-desktop
Distro:  openSUSE 13.1 (x86_64) with KDE Development Platform: 4.13.2
Uptime:  06:00am up 2 days 9:43, 5 users, load average: 0.00, 0.02, 0.05
-BEGIN PGP SIGNATURE-
Version: GnuPG v2.0.22 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/

iEYEARECAAYFAlO8Nw8ACgkQ0Sr7eZJrmU6HVwCaAkT+nqxn818s1Di8mgqc9U1a
qksAni7exn27xTGgDV2O6vSNtg8FbgMK
=9I7G
-END PGP SIGNATURE-
___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] subprocess.call not formatting date

2014-07-08 Thread Emile van Sebille 

On 7/8/2014 9:44 AM, Bob Williams wrote:

-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1

I'm using Python 2.7.6 on an openSUSE linux system.

I'm trying to convert a shell (bash) script to a python script, and 
everything's worked OK except this. The following line in the shell script

btrfs subvolume snapshot /home/bob/A3/documents /home/bob/A3/docsnaps/`date 
+%y-%m-%d_%H-%M`

creates a folder of the form

/home/bob/A3/docsnaps/14-07-08_17-32

ie. the name is a formatted date string, which is what I want.

In my python script, this

subprocess.call('btrfs', 'subvolume', 'snapshot', '/home/bob/A3/documents', 
'/home/bob/A3/docsnaps/`date +%y-%m-%d_%H-%M`')

creates a folder

/home/bob/A3/docsnaps/`date +%y-%m-%d_%H-%M`

In other words, it does not format the date, but takes the stuff between the 
backticks (`) as a string.

I tried adding shell=True, but got the following error:

Traceback (most recent call last):
   File "/home/bob/bin/btrfs-backup.py", line 55, in 
 subprocess.call('btrfs', 'subvolume', 'snapshot', 
'/home/bob/A3/documents', '/home/bob/A3/docsnaps/`date +%y-%m-%d_%H-%M`', 
shell=True)
   File "/usr/lib64/python2.7/subprocess.py", line 522, in call
 return Popen(*popenargs, **kwargs).wait()
   File "/usr/lib64/python2.7/subprocess.py", line 658, in __init__
 raise TypeError("bufsize must be an integer")
TypeError: bufsize must be an integer

Any suggestions, please?


Pass in the formatted string using the python datetime module.

datetime.datetime.today().strftime("%y-%m-%d_%H-%M")

see https://docs.python.org/2/library/datetime.html for more details.

Emile



___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor

Re: [Tutor] subprocess.call not formatting date

2014-07-08 Thread Peter Otten 
Bob Williams wrote:

> -BEGIN PGP SIGNED MESSAGE-
> Hash: SHA1
> 
> I'm using Python 2.7.6 on an openSUSE linux system.
> 
> I'm trying to convert a shell (bash) script to a python script, and
> everything's worked OK except this. The following line in the shell script
> 
> btrfs subvolume snapshot /home/bob/A3/documents
> /home/bob/A3/docsnaps/`date +%y-%m-%d_%H-%M`
> 
> creates a folder of the form
> 
> /home/bob/A3/docsnaps/14-07-08_17-32
> 
> ie. the name is a formatted date string, which is what I want.
> 
> In my python script, this
> 
> subprocess.call('btrfs', 'subvolume', 'snapshot',
> '/home/bob/A3/documents', '/home/bob/A3/docsnaps/`date +%y-%m-%d_%H-%M`')
> 
> creates a folder
> 
> /home/bob/A3/docsnaps/`date +%y-%m-%d_%H-%M`
> 
> In other words, it does not format the date, but takes the stuff between
> the backticks (`) as a string.
> 
> I tried adding shell=True, but got the following error:
> 
> Traceback (most recent call last):
>   File "/home/bob/bin/btrfs-backup.py", line 55, in 
> subprocess.call('btrfs', 'subvolume', 'snapshot',
> '/home/bob/A3/documents', '/home/bob/A3/docsnaps/`date
> +%y-%m-%d_%H-%M`', shell=True)
>   File "/usr/lib64/python2.7/subprocess.py", line 522, in call
> return Popen(*popenargs, **kwargs).wait()
>   File "/usr/lib64/python2.7/subprocess.py", line 658, in __init__
> raise TypeError("bufsize must be an integer")
> TypeError: bufsize must be an integer

That's because the second argument to call() is bufsize, and you are passing
it the string "subvolume". While I suppose that

# untested
subprocess.call("btrfs subvolume snapshot /home/bob/A3/documents 
/home/bob/A3/docsnaps/`date +%y-%m-%d_%H-%M`", shell=True)

would work I suggest that you calculate the folder name in Python instead:

# untested
name = datetime.datetime.now().strftime("%y-%m-%d_%H-%M")
destpath = os.path.join("/home/bob/A3/docsnaps", name)
subprocess.call(
["btrfs", "subvolume", "snapshot", "/home/bob/A3/documents", destpath])


___
Tutor maillist  -  Tutor@python.org
To unsubscribe or change subscription options:
https://mail.python.org/mailman/listinfo/tutor