backport check_output for 2.6

weboob/tools/compat.py

@@ -18,7 +18,7 @@
 # along with weboob. If not, see <http://www.gnu.org/licenses/>.
 
 
-__all__ = ['unicode', 'long', 'basestring']
+__all__ = ['unicode', 'long', 'basestring', 'check_output']
 
 
 try:
@@ -35,3 +35,25 @@ try:
     basestring = basestring
 except NameError:
     basestring = str
+
+
+try:
+    from subprocess import check_output
+except ImportError:
+    import subprocess
+
+    def check_output(*popenargs, **kwargs):
+        r"""Run command with arguments and return its output as a byte string.
+        Backported from Python 2.7 as it's implemented as pure python on stdlib.
+        """
+        process = subprocess.Popen(stdout=subprocess.PIPE, *popenargs, **kwargs)
+        output, unused_err = process.communicate()
+        retcode = process.poll()
+        if retcode:
+            cmd = kwargs.get("args")
+            if cmd is None:
+                cmd = popenargs[0]
+            error = subprocess.CalledProcessError(retcode, cmd)
+            error.output = output
+            raise error
+        return output