[Tutor] How to run multiline shell command within python
kliateni at gmail.com
Thu Jan 10 20:07:16 CET 2013
On 10/01/2013 16:21, Matty Sarro wrote:
> Have you looked a the pexpect class? It works like gangbusters,
> especially if you're trying to run something with an interactive shell.
> On Thu, Jan 10, 2013 at 9:25 AM, Karim <kliateni at gmail.com
> <mailto:kliateni at gmail.com>> wrote:
> On 10/01/2013 09:31, Hugo Arts wrote:
>> On Thu, Jan 10, 2013 at 7:01 AM, Karim <kliateni at gmail.com
>> <mailto:kliateni at gmail.com>> wrote:
>> Hello all,
>> I want to run multiline shell command within python without
>> using a command file but directly execute several lines of shell.
>> I already use *subprocess.checkoutput("csh -f
>> my_file.csh".split())* but I want to know if it is posssible
>> to avoid making file and execute
>> shell lines of code directly.
>> Yes, this is very possible. Specify shell=True as an argument and
>> you can do anything you can do in a shell:
>> >>> commands = """echo hello
>> ... echo hello | wc -l
>> ... ps aux | grep python"""
>> >>> b = subprocess.check_output(commands, shell=True)
>> >>> print(b.decode('ascii'))
>> hugo 1255 1.0 0.6 777316 49924 ? Sl 09:14 0:08
>> /usr/bin/python2 /usr/bi
>> hugo 6529 0.0 0.0 42408 7196 pts/0 S+ 09:23 0:00
>> hugo 6559 0.0 0.0 10656 1128 pts/0 S+ 09:28 0:00
>> grep python
>> watch out though, accepting user input into the commands variable
>> will lead to shell injection, which can be a dangerous security
> Many thanks Hugo. It makes my day!
> In my case there are no possibilities for shell injection. It is
> internal to a class.
I will have a look specially for interactive session.
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