first potentially useful version

utils/epics.py

@@ -0,0 +1,47 @@
+import numpy as np
+
+from .alarms import message
+from .colors import colored
+from .consts import COL_NOT_CONNECTED, COL_SUCCESS, COL_ALARM
+from .consts import MSG_NOT_CONNECTED, MSG_SUCCESS
+
+
+class DataGetter:
+
+    def __init__(self, timeout, silent):
+        self.timeout = timeout
+        self.silent = silent
+
+    def __call__(self, pv):
+        connected = pv.wait_for_connection(self.timeout)
+
+        if not connected:
+            value = np.nan
+            status = severity = -1
+            msg = MSG_NOT_CONNECTED
+            col = COL_NOT_CONNECTED
+        else:
+            value = pv.value
+            status = pv.status
+            severity = pv.severity
+            if status == 0 and severity == 0:
+                msg = MSG_SUCCESS
+                col = COL_SUCCESS
+            else:
+                msg = message(status, severity)
+                col = COL_ALARM
+
+        data = {
+            "connected": connected,
+            "value": value,
+            "status": status,
+            "severity": severity
+        }
+
+        if not self.silent:
+            msg = colored(col, msg)
+            print(pv.pvname, msg)
+        return data
+
+
+