Creating a Python Ruby bridge

ruby_pybridge/hola.rb

@@ -0,0 +1,10 @@
+while cmd = STDIN.gets
+  cmd.chop!
+  if cmd == "exit"
+    break
+  else
+    print eval(cmd),"\n"
+    print "[end]\n"
+    STDOUT.flush
+  end
+end

ruby_pybridge/holaback.py

@@ -0,0 +1,19 @@
+from subprocess import Popen, PIPE, STDOUT
+
+print 'launching hola process...'
+hola = Popen(['ruby', 'hola.rb'], stdin=PIPE, stdout=PIPE, stderr=STDOUT)
+
+while True:
+    line = raw_input('Enter expression or exit:')
+    hola.stdin.write(line+'\n')
+    result = []
+    while True:
+        if hola.poll() is not None:
+            print 'hola has terminated.'
+            exit()
+        line = hola.stdout.readline().rstrip()
+        if line == '[end]':
+            break
+        result.append(line)
+    print 'result:'
+    print '\n'.join(result)