Forward stdout and stderr from Python to terminal

Author: robertodr

tools/pcmsolver.py.in

@@ -189,11 +189,18 @@ def parse_pcm_input(inputFile):
 def execute(parsedFile):
     executable = os.path.join(os.path.dirname(__file__), "run_pcm" + "@CMAKE_EXECUTABLE_SUFFIX@")
     if (executable):
-        try:
-            subprocess.check_output([executable, parsedFile])
-        except subprocess.CalledProcessError as e:
-            print((e.output))
-            sys.exit(1)
+        p = subprocess.Popen([executable, parsedFile],
+                             shell=False,
+                             stdin=subprocess.PIPE,
+                             stdout=subprocess.PIPE,
+                             stderr=subprocess.PIPE)
+        stdout_coded, stderr_coded = p.communicate()
+        stdout = stdout_coded.decode('UTF-8')
+        stderr = stderr_coded.decode('UTF-8')
+
+        print(stdout)
+        # Print the contents of stderr, without exiting
+        sys.stderr.write(stderr)
     else:
         print('No executable available for standalone run')
         sys.exit(1)