print globals to quickly test access to all devices, fixed devices built from SmarActRecord, cleaned str of laser object, fixed __str__ cannot return None, fake epics device get method returns number to satisfy some string formatting

alvra.py

@@ -72,4 +72,12 @@ print(shut_und)
 print(pbps_und)
 
 
+for k, v in dict(globals()).items():
+    if k.startswith("__"):
+        continue
+    print("-" * 10)
+    print(k)
+    print(v)
+
+print(laser)