diff --git a/syscore/pandas/pdutils.py b/syscore/pandas/pdutils.py
index 5e5491285b..582bc112ca 100755
--- a/syscore/pandas/pdutils.py
+++ b/syscore/pandas/pdutils.py
@@ -11,7 +11,8 @@
 from syscore.constants import named_object, arg_not_supplied
 
 DEFAULT_DATE_FORMAT_FOR_CSV = "%Y-%m-%d %H:%M:%S"
-EXPECTED_LENGTH_OF_DATE =  19
+EXPECTED_LENGTH_OF_DATE = 19
+
 
 def rolling_pairwise_correlation(
     x: pd.DataFrame, periods: int, min_periods: int = 3
@@ -105,7 +106,9 @@ def pd_readcsv(
     df = pd.read_csv(filename, skiprows=skiprows, skipfooter=skipfooter)
 
     ## Add time index as index
-    df = add_datetime_index(df=df, date_index_name=date_index_name, date_format=date_format)
+    df = add_datetime_index(
+        df=df, date_index_name=date_index_name, date_format=date_format
+    )
 
     if input_column_mapping is not arg_not_supplied:
         df = remap_columns_in_pd(df, input_column_mapping)
@@ -113,11 +116,18 @@ def pd_readcsv(
     return df
 
 
-def add_datetime_index(df: pd.DataFrame, date_index_name: str, date_format: str = DEFAULT_DATE_FORMAT_FOR_CSV, expected_length_of_date: int = EXPECTED_LENGTH_OF_DATE) -> pd.DataFrame:
+def add_datetime_index(
+    df: pd.DataFrame,
+    date_index_name: str,
+    date_format: str = DEFAULT_DATE_FORMAT_FOR_CSV,
+    expected_length_of_date: int = EXPECTED_LENGTH_OF_DATE,
+) -> pd.DataFrame:
     date_index = df[date_index_name]
     date_index = date_index.astype(str)
-    def left(x:str, n):
+
+    def left(x: str, n):
         return x[:n]
+
     date_index = date_index.apply(left, n=EXPECTED_LENGTH_OF_DATE)
     df.index = pd.to_datetime(date_index, format=date_format).values
     del df[date_index_name]
@@ -125,6 +135,7 @@ def left(x:str, n):
 
     return df
 
+
 def remap_columns_in_pd(df: pd.DataFrame, input_column_mapping: dict) -> pd.DataFrame:
     """
     Returns the bool for columns of slice_data for which we have at least one non nan value
diff --git a/sysproduction/backup_parquet_data_to_remote.py b/sysproduction/backup_parquet_data_to_remote.py
index 1018d1ce6d..29d482717c 100644
--- a/sysproduction/backup_parquet_data_to_remote.py
+++ b/sysproduction/backup_parquet_data_to_remote.py
@@ -1,11 +1,7 @@
 import os
 from sysdata.config.production_config import get_production_config
 
-from sysproduction.data.directories import (
-
-    get_parquet_backup_directory
-
-)
+from sysproduction.data.directories import get_parquet_backup_directory
 
 from sysdata.data_blob import dataBlob
 
@@ -18,7 +14,6 @@ def backup_parquet_data_to_remote():
     return None
 
 
-
 def get_parquet_directory(data):
     return data.parquet_root_directory
 
@@ -33,6 +28,7 @@ def backup_parquet(self):
         log.debug("Copying data to backup destination")
         backup_parquet_data_to_remote_with_data(data)
 
+
 def backup_parquet_data_to_remote_with_data(data):
     source_path = get_parquet_directory(data)
     destination_path = get_parquet_backup_directory()
diff --git a/sysproduction/data/directories.py b/sysproduction/data/directories.py
index 07907eef5c..6f82add5d5 100644
--- a/sysproduction/data/directories.py
+++ b/sysproduction/data/directories.py
@@ -7,7 +7,6 @@
 production_config = get_production_config()
 
 
-
 def get_main_backup_directory():
     ans = production_config.get_element("offsystem_backup_directory")
     return get_resolved_pathname(ans)
@@ -19,6 +18,7 @@ def get_csv_backup_directory():
 
     return ans
 
+
 def get_parquet_backup_directory():
     main_backup = get_main_backup_directory()
     ans = os.path.join(main_backup, "parquet")
diff --git a/sysproduction/reporting/data/pricechanges.py b/sysproduction/reporting/data/pricechanges.py
index 422733fdf6..01d4cb1f28 100644
--- a/sysproduction/reporting/data/pricechanges.py
+++ b/sysproduction/reporting/data/pricechanges.py
@@ -209,7 +209,9 @@ def get_percentage_change_from_series_for_period(
     price_series_for_period = price_series[start_date:end_date]
     if len(price_series_for_period) == 0:
         return np.nan
-    return 100 * ((price_series_for_period.iloc[-1] / price_series_for_period.iloc[0]) - 1)
+    return 100 * (
+        (price_series_for_period.iloc[-1] / price_series_for_period.iloc[0]) - 1
+    )
 
 
 def get_stdev_at_start_date_for_instrument(
diff --git a/sysproduction/run_backups.py b/sysproduction/run_backups.py
index 7b53cd0a8f..224102daec 100644
--- a/sysproduction/run_backups.py
+++ b/sysproduction/run_backups.py
@@ -29,7 +29,7 @@ def get_list_of_timer_functions_for_backup():
         ("backup_db_to_csv", db_backup_object),
         ("backup_mongo_data_as_dump", mongodump_backup_object),
         ("backup_files", statefile_backup_object),
-        ("backup_parquet", parquet_backup_object)
+        ("backup_parquet", parquet_backup_object),
     ]
 
     return list_of_timer_names_and_functions