virtualenv progress

jedi/_compatibility.py

@@ -289,3 +289,25 @@ def utf8_repr(func):
         return func
     else:
         return wrapper
+
+
+try:
+    from subprocess import check_output
+except ImportError:
+    def check_output(*popenargs, **kwargs):
+        """
+        Taken from Python 2.6.
+        """
+        from subprocess import Popen, PIPE, CalledProcessError
+
+        if 'stdout' in kwargs:
+            raise ValueError('stdout argument not allowed, it will be overridden.')
+        process = Popen(stdout=PIPE, *popenargs, **kwargs)
+        output, unused_err = process.communicate()
+        retcode = process.poll()
+        if retcode:
+            cmd = kwargs.get("args")
+            if cmd is None:
+                cmd = popenargs[0]
+            raise CalledProcessError(retcode, cmd, output=output)
+        return output