define __slots__ for class ByteFifo (#202)

* define __slots__ for class ByteFifo

* disable set-timezone action

* set set-timezone to UTC

* try MathRobin/timezone-action@v1.1

* set TZ to "Europe/Berlin"

* define __slots__

.github/workflows/python-app.yml

@@ -24,18 +24,15 @@ permissions:
   contents: read
   pull-requests: read # allows SonarCloud to decorate PRs with analysis results
 
+env:
+  TZ: "Europe/Berlin"
+
 jobs:
   build:
 
     runs-on: ubuntu-latest
 
     steps:
-    - name: Set timezone
-      uses: szenius/set-timezone@v2.0
-      with:
-        timezoneLinux: "Europe/Berlin"
-        timezoneMacos: "Europe/Berlin"
-        timezoneWindows: "Europe/Berlin"
     # - name: Start Mosquitto
     #  uses: namoshek/mosquitto-github-action@v1
     #  with:

app/src/byte_fifo.py

@@ -7,6 +7,8 @@ else:  # pragma: no cover
 
 class ByteFifo:
     """ a byte FIFO buffer with trigger callback """
+    __slots__ = ('__buf', '__trigger_cb')
+
     def __init__(self):
         self.__buf = bytearray()
         self.__trigger_cb = None

app/src/gen3/infos_g3.py

@@ -10,6 +10,8 @@ else:  # pragma: no cover
 
 
 class RegisterMap:
+    __slots__ = ()
+
     map = {
         0x00092ba8: {'reg': Register.COLLECTOR_FW_VERSION},
         0x000927c0: {'reg': Register.CHIP_TYPE},
@@ -91,6 +93,7 @@ class RegisterMap:
 
 
 class InfosG3(Infos):
+    __slots__ = ()
 
     def ha_confs(self, ha_prfx: str, node_id: str, snr: str,
                  sug_area: str = '') \

app/src/gen3plus/infos_g3p.py

@@ -10,8 +10,8 @@ else:  # pragma: no cover
 
 class RegisterMap:
     # make the class read/only by using __slots__
-
     __slots__ = ()
+
     map = {
         # 0x41020007: {'reg': Register.DEVICE_SNR,           'fmt': '<L'},                 # noqa: E501
         0x41020018: {'reg': Register.DATA_UP_INTERVAL,     'fmt': '<B', 'ratio':   60, 'dep': ProxyMode.SERVER},  # noqa: E501
@@ -68,6 +68,8 @@ class RegisterMap:
 
 
 class InfosG3P(Infos):
+    __slots__ = ('client_mode', )
+
     def __init__(self, client_mode: bool):
         super().__init__()
         self.client_mode = client_mode

app/src/infos.py

@@ -152,6 +152,8 @@ class ClrAtMidnight:
 
 
 class Infos:
+    __slots__ = ('db', 'tracer', )
+
     LIGHTNING = 'mdi:lightning-bolt'
     COUNTER = 'mdi:counter'
     GAUGE = 'mdi:gauge'