Question

Environment: python 2.6
path="/this/is/an/example/"

cmd={'Foo': (PATH + 'sh forExample.sh'), 'blah': (PATH + 'sh secExample.sh')}

for app in cmd.keys():
    print 'app name', app

it prints as expected Foo

However, when I try to access ‘sh forExample.sh’

   for app in cmd.keys():
        print 'app name', app
        run_apps([app])

where run_apps function looks like this..

def run_apps(apps):
        for a in apps:
                print a
                cmdlist = cmd[a][0]
                print cmdlist

It does not give the expected output, but instead gives 's'. I tried varying the value in cmd[a][x], it keeps giving the value of the character which X points to.

Oh and this was the error: /bin/sh: 1: /: Permission denied
I am using Linux, distro: Ubuntu.

any idea what the error is? where I am going on?

Answer 1

The value of Foo of your cmd dict is 'sh forExample.sh'.

So cmd[a][0] will result in the first character of that string.

---

Looking at this line

cmd={'Foo': ('sh forExample.sh'), 'blah': ('sh secExample.sh')}

it seems that you want to have a tuple as value in your dict. To create a one-value tuple, just append a , and your code should work as expected:

cmd={'Foo': ('sh forExample.sh',), 'blah': ('sh secExample.sh',)}

Now the value of cmd[a] is ('sh forExample.sh',), and accesing it with [0] will yield 'sh forExample.sh' .