Whitespace cleanups; rename InfluxDB field from "gauge" to "value"

... this abandons Prometheus "compatibility" for a better fit with InfluxDB naming.

bms.py

@@ -225,11 +225,11 @@ def parse_03_response(response):
 
         current = bytes_to_digits(response[6], response[7])
         current = convert_to_signed(current) * 0.01
-        data["bms_current_amps"] = dict()
-        data["bms_current_amps"]['help']  = "Current"
-        data["bms_current_amps"]['raw_value'] = current
-        data["bms_current_amps"]['value'] = "{:.2f}".format(current)
-        data["bms_current_amps"]['units'] = "A"
+        data['bms_current_amps'] = dict()
+        data['bms_current_amps']['help'] = "Current"
+        data['bms_current_amps']['raw_value'] = current
+        data['bms_current_amps']['value'] = "{:.2f}".format(current)
+        data['bms_current_amps']['units'] = "A"
         if debug > 1:
             print("Current: {:.2f}A".format(current))
 
@@ -689,15 +689,15 @@ def influxdb_create_snapshot(data):
     helpmsg = ''
     units = ''
     now = datetime.datetime.now(datetime.timezone.utc).isoformat()
-    ''' Note that the fieldname is set to "gauge" in order to retain
-        compatibility with data imported from Prometheus (and it's
-        as good a name as any). '''
     for kind, contains in data.items():
+        helpmsg = None
         if contains.get('help'):
             helpmsg = contains.get('help')
+        units = None
         if contains.get('units'):
             units = contains.get('units')
         # Simple values
+        value = None
         if contains.get('raw_value') is not None:
             value = contains.get('raw_value')
             if debug > 2:
@@ -705,10 +705,11 @@ def influxdb_create_snapshot(data):
             point = Point(kind) \
                 .tag("units", units) \
                 .tag("help", helpmsg) \
-                .field("gauge", value) \
+                .field("value", value) \
                 .time(now)
             points.append(point)
         # Doesn't have a value, but multiple values, each with a label:
+        label = None
         if contains.get('raw_values') is not None and isinstance(contains.get('raw_values'), dict):
             label = contains.get('label')
             for idx, label_value in contains.get('raw_values').items():
@@ -718,7 +719,7 @@ def influxdb_create_snapshot(data):
                     .tag(label, idx) \
                     .tag("units", units) \
                     .tag("help", helpmsg) \
-                    .field("gauge", label_value) \
+                    .field("value", label_value) \
                     .time(now)
                 points.append(point)
         # Information (like a manufacturing date or a serial number)
@@ -729,7 +730,7 @@ def influxdb_create_snapshot(data):
             point = Point(kind) \
                 .tag("units", units) \
                 .tag("help", helpmsg) \
-                .field("gauge", value) \
+                .field("value", value) \
                 .time(now)
             points.append(point)
         else: