Fix several code style issues

shc/data_logging.py

@@ -176,7 +176,7 @@ class WritableDataLogVariable(DataLogVariable[T], Writable[T], Generic[T], metac
     :meth:`retrieve_log`, as usual for `DataLogVariables`. In addition, derived classes shall allow to set override
     `external_updates` attribute for each instance (via an __init__ parameter) to disable push updates for data logs
     which are updated externally.
-    
+
     :ivar external_updates: Specifies, whether SHC-external updates to the data log are expected. This effectively
         will make this class unsubscribable (because we cannot guarantee to reproduce a consistent log through push
         updates), so attached `LiveDataLogView` will fall back to periodic polling of the log.

shc/interfaces/in_memory_data_logging.py

@@ -17,7 +17,7 @@ class InMemoryDataLogVariable(Writable[T], DataLogVariable[T], Readable[T], Gene
     restart of the SHC application. It's also fine for demonstration purposes (see ui_logging_showcase.py in the
     examples/ directory).
 
-    :param type\_: Value type of this `connectable` object (and as a `DataLogVariable`)
+    :param type\\_: Value type of this `connectable` object (and as a `DataLogVariable`)
     :param keep: timespan for which to keep the values. Older values will be deleted upon the next `write` to the
                  object.
     """

shc/interfaces/mysql.py

@@ -42,7 +42,7 @@ class MySQLConnector(ReadableStatusInterface):
         );
 
     For data logging of all value types that are derived from `int` (incl. `bool`), `float` or `str`, the respective
-    `value\_` column is used. This includes Enum types with a value base type in any of those. Otherwise, the value is
+    `value\\_` column is used. This includes Enum types with a value base type in any of those. Otherwise, the value is
     JSON-encoded, using SHC's generic JSON encoding/decoding system from the :mod:`shc.conversion`, and stored in the
     `value_str` column.
 
@@ -143,7 +143,6 @@ def persistence_variable(self, type_: Type[T], name: str) -> "MySQLPersistenceVa
             self.persistence_variables[name] = variable
             return variable
 
-
     def __repr__(self) -> str:
         return "{}({})".format(self.__class__.__name__, {k: v for k, v in self.connect_args.items()
                                                          if k in ('host', 'db', 'port', 'unix_socket')})

shc/web/log_widgets.py

@@ -27,6 +27,7 @@
 from ..base import T
 from .interface import WebPageItem, WebUIConnector, jinja_env
 
+
 class LogListDataSpec(NamedTuple, Generic[T]):
     """Specification of one data log source and the formatting of its datapoints within a :class:`LogListWidget`"""
     #: The `DataLogVariable` (i.e. logging database connector) to retrieve the recent datapoints and updates from

test/interfaces/test_mysql.py

@@ -21,7 +21,7 @@ def parse_mysql_url(url: str) -> Dict[str, Any]:
     except ValueError as e:
         print(f"Could not parse MySQL connection URL: {e}")
     if parts.scheme != "mysql":
-        print(f"Could not parse MySQL connection URL: Schema is not 'mysql'")
+        print("Could not parse MySQL connection URL: Schema is not 'mysql'")
     result: Dict[str, Any] = {'user': parts.username, 'password': parts.password, 'db': parts.path.lstrip("/")}
     if parts.netloc.startswith("/"):
         result["unix_socket"] = parts.hostname
@@ -37,7 +37,7 @@ def parse_mysql_url(url: str) -> Dict[str, Any]:
 if MYSQL_URL is not None:
     MYSQL_ARGS = parse_mysql_url(MYSQL_URL)
     # pymysql uses slightly different args than aiomysql
-    PYMYSQL_ARGS = dict(MYSQL_ARGS, database= MYSQL_ARGS["db"])
+    PYMYSQL_ARGS = dict(MYSQL_ARGS, database=MYSQL_ARGS["db"])
     del PYMYSQL_ARGS["db"]
 else:
     MYSQL_ARGS = {}
@@ -57,7 +57,8 @@ class MySQLTest(AbstractLoggingTest):
     do_subscribe_tests = True
 
     def setUp(self) -> None:
-        self._run_mysql_sync(["""
+        self._run_mysql_sync([
+            """
             CREATE TABLE `log` (
                 name VARCHAR(256) NOT NULL,
                 ts DATETIME(6) NOT NULL,

test/test_data_logging.py

@@ -5,7 +5,7 @@
 from typing import List, Tuple, Generic, Type, Iterable, Any, Sequence, Union, Dict, Optional
 
 import shc.data_logging
-from shc.base import T, UninitializedError, Readable, Writable
+from shc.base import T, UninitializedError, Readable
 from ._helper import async_test, ClockMock
 
 time_series_1 = [
@@ -465,6 +465,7 @@ async def test_push(self) -> None:
         view = ExampleLiveDataLogView(log_var,
                                       interval=datetime.timedelta(seconds=30),
                                       update_interval=datetime.timedelta(seconds=2))
+
         async def pusher():
             for t, v in time_series_1:
                 await asyncio.sleep(max(0.0, (t - datetime.datetime.now().astimezone()).total_seconds()))
@@ -491,6 +492,7 @@ async def test_push_two_clients(self) -> None:
         view = ExampleLiveDataLogView(log_var,
                                       interval=datetime.timedelta(seconds=30),
                                       update_interval=datetime.timedelta(seconds=10))
+
         async def pusher():
             for t, v in time_series_1:
                 await asyncio.sleep(max(0.0, (t - datetime.datetime.now().astimezone()).total_seconds()))