Initial data commit

Task/Execute-a-system-command/Python/execute-a-system-command-1.py

@@ -0,0 +1,3 @@
+import os
+exit_code = os.system('ls')       # Just execute the command, return a success/fail code
+output    = os.popen('ls').read() # If you want to get the output data. Deprecated.

Task/Execute-a-system-command/Python/execute-a-system-command-2.py

@@ -0,0 +1,5 @@
+import subprocess
+# if the exit code was non-zero these commands raise a CalledProcessError
+exit_code = subprocess.check_call(['ls', '-l'])   # Python 2.5+
+assert exit_code == 0
+output    = subprocess.check_output(['ls', '-l']) # Python 2.7+

Task/Execute-a-system-command/Python/execute-a-system-command-3.py

@@ -0,0 +1,3 @@
+from subprocess import PIPE, Popen, STDOUT
+p = Popen('ls', stdout=PIPE, stderr=STDOUT)
+print p.communicate()[0]

Task/Execute-a-system-command/Python/execute-a-system-command-4.py

@@ -0,0 +1,4 @@
+import commands
+stat, out = commands.getstatusoutput('ls')
+if not stat:
+    print out