Add check for empty/None values. (#20)

Add check for empty/None values.

Co-authored-by: Anubhav Singh <anubhav.singh@logicmonitor.com>

Author: anubhav6663

logicmonitor_data_sdk/api/metrics.py

@@ -105,6 +105,10 @@ def send_metrics(self, **kwargs):  # noqa: E501
                 raise TypeError(
                     "Got an unexpected keyword argument '%s' to method SendMetrics" % key
                 )
+            if val is None:
+                raise ValueError(
+                    "Key '%s' should NOT be None" % key
+                )
             params[key] = val
         del params['kwargs']
         del params['self']

logicmonitor_data_sdk/models/datasource.py

@@ -152,8 +152,8 @@ def id(self):
 
     @id.setter
     def id(self, id):
-        if id is not None and id < 0:
-            raise ValueError("DataSource Id {%s} should not be negative." % id)
+        if id is not None and (type(id) is not int or id < 0):
+            raise ValueError("DataSource Id {%s} should not be negative, empty or of type string." % id)
         self._id = id
 
     @property