diff --git a/bw2calc/__init__.py b/bw2calc/__init__.py
index 9371b7e..73077fc 100644
--- a/bw2calc/__init__.py
+++ b/bw2calc/__init__.py
@@ -10,10 +10,11 @@
 __version__ = "2.0.DEV16"
 
 
-import json_logging
 import platform
 import warnings
 
+import json_logging
+
 json_logging.init_non_web(enable_json=True)
 
 ARM = {"arm", "arm64", "aarch64_be", "aarch64", "armv8b", "armv8l"}
diff --git a/bw2calc/log_utils.py b/bw2calc/log_utils.py
index b73a78f..db98bf2 100644
--- a/bw2calc/log_utils.py
+++ b/bw2calc/log_utils.py
@@ -82,7 +82,7 @@ def json_record(self, message, extra, record):
         else:
             # Also support logger.info({'foo': 'bar'})
             data = eval(message)
-        data["time"] = utc_now().isoformat() + 'Z'
+        data["time"] = utc_now().isoformat() + "Z"
 
         if record.exc_info:
             data["exc_info"] = self.formatException(record.exc_info)
@@ -92,11 +92,13 @@ def json_record(self, message, extra, record):
 def create_logger(dirpath=None, name=None, **kwargs):
     """Create a ``logger`` instance named ``bw2calc`` that can be used to log calculations.
 
-    ``dirpath`` is the directory where the log file is saved. If ``dirpath`` is ``None``, no logger is created.
+    ``dirpath`` is the directory where the log file is saved. If ``dirpath`` is ``None``, no logger
+    is created.
 
     ``name`` is the name of the calculation run, used to construct the log filepath.
 
-    You can add other types of loggers, just add another handler to the ``bw2calc`` named logger before starting your calculations.
+    You can add other types of loggers, just add another handler to the ``bw2calc`` named logger
+    before starting your calculations.
 
     Returns the filepath of the created log file.
 
@@ -108,7 +110,7 @@ def create_logger(dirpath=None, name=None, **kwargs):
     assert os.path.isdir(dirpath) and os.access(dirpath, os.W_OK)
 
     # Use safe_filepath here
-    filename = "{}.{}.json".format(name or uuid.uuid4().hex, utc_now().isoformat() + 'Z')
+    filename = "{}.{}.json".format(name or uuid.uuid4().hex, utc_now().isoformat() + "Z")
 
     formatter = JSONFormatter()
     fp = os.path.abspath(os.path.join(dirpath, filename))
diff --git a/bw2calc/single_value_diagonal_matrix.py b/bw2calc/single_value_diagonal_matrix.py
index 3db2b29..7953051 100644
--- a/bw2calc/single_value_diagonal_matrix.py
+++ b/bw2calc/single_value_diagonal_matrix.py
@@ -51,7 +51,7 @@ def __init__(
         seed_override: Union[int, None] = None,
         indexer_override: Any = None,
         custom_filter: Union[Callable, None] = None,
-        **kwargs
+        **kwargs,
     ):
         self.dimension = dimension