How do I go about running a bash script using the subprocess module, to which I must give several arguments?
This is what I'm currently using:
subprocess.Popen(['/my/file/path/programname.sh', 'arg1 arg2 %s' % arg3], \
shell = True)
The bash script seems not to be taking any of the parameters in. Any insights are greatly appreciated!
Pass arguments as a list, see the very first code example in the docs:
import subprocess
subprocess.check_call(['/my/file/path/programname.sh', 'arg1', 'arg2', arg3])
If arg3 is not a string; convert it to string before passing to check_call(): arg3 = str(arg3).
arg3 = 1, to convert it, you could call str(arg3) that returns '1'.
subprocess.Popen(['/my/file/path/programname.sh arg1 arg2 %s' % arg3], shell = True).
If you use shell = True the script and its arguments have to be passed as a string. Any other elements in the args sequence will be treated as arguments to the shell.
You can find the complete docs at http://docs.python.org/2/library/subprocess.html#subprocess.Popen.
One more example, which is not included in all the above ones,
subprocess.Popen(['/your/script.sh %s %s %s' %(argument1,argument2,argument3)], shell = True)
Please note that, when you type %(argument1,argument2,argument3), there should not be any space between % and (, eg % (argument1,argument2,argument3) is not valid.
Hi I know that this is solution is quite late, but could help someone.
example:
import subprocess
pass_arg=[]
pass_arg[0]="/home/test.sh"
pass_arg[1]="arg1"
pass_arg[2]="arg2"
subprocess.check_call(pass_arg)
The above example provides arg1 and arg2 as parameters to the shell script test.sh
Essentially, subprocess expects an array. So you could populate an array and provide it as a parameter.
You forgot to add args name.
subprocess.Popen(args=['./test.sh', 'arg1 arg2 %s' % arg3], shell=True)
This is how it worked for me
import subprocess
subprocess.Popen(["path/to/file.sh", arg1, arg2, arg3])
Since Python 3.5, most use cases are fine using subprocess.run() instead of Popen() (which of course can still be used).
See also this answer: https://stackoverflow.com/a/39187984/6266506
The fix for this question remains "use either a list of arguments or just one string", as stated in this section of the documentation.
