diff --git a/data_scraper/cboe.py b/data_scraper/cboe.py
index 67df983..9796b79 100644
--- a/data_scraper/cboe.py
+++ b/data_scraper/cboe.py
@@ -71,9 +71,6 @@ def fetch_data(symbols=None):
     retry_failure(failed,done)
     send_report(done, failed, __name__)
 
-
-
-
 ##if a symbol failes to scrape try again exponentialy
 @tenacity.retry(wait=tenacity.wait_exponential(multiplier=300), stop = tenacity.stop_after_attempt(10), retry=tenacity.retry_if_exception_type(IOError))
 def retry_failure(failed, done):
@@ -101,8 +98,6 @@ def retry_failure(failed, done):
             done+=1
             failed.remove(symbol)
 
-
-
 def aggregate_monthly_data(symbols=None):
     """Aggregate daily snapshots into monthly files and validate data"""
     symbols = symbols or _get_all_listed_symbols()
@@ -132,7 +127,7 @@ def aggregate_monthly_data(symbols=None):
             daily_files = [
                 os.path.join(daily_dir, name) for name in file_names
             ]
-            
+
             try:
                 symbol_df = concatenate_files(daily_files)
             except Exception:
@@ -174,10 +169,8 @@ def aggregate_monthly_data(symbols=None):
             for file in daily_files:
                 utils.remove_file(file, logger)
     
-
     send_report(done, failed, __name__, op="aggregate")
 
-
 def _get_all_listed_symbols():
     """Returns array of all listed symbols.
     http://www.cboe.com/publish/scheduledtask/mktdata/cboesymboldir2.csv
@@ -188,7 +181,6 @@ def _get_all_listed_symbols():
     symbols_df = pd.read_csv(symbols_file, skiprows=1)
     return symbols_df["Stock Symbol"].array
 
-
 def concatenate_files(files):
     """Returns a dataframe of the concatenated data from `files`."""
     df_generator = (pd.read_csv(file) for file in sorted(files))
diff --git a/data_scraper/notifications.py b/data_scraper/notifications.py
index 31ecce2..3b5bd60 100644
--- a/data_scraper/notifications.py
+++ b/data_scraper/notifications.py
@@ -66,6 +66,5 @@ def send_report(done, failed, scraper, op="scrape"):
     msg= msg_success + '\n' + msg_fail
     slack_notification(msg, scraper, status=Status.Warning)
 
-
 def _symbol_str(count):
     return str(count) + " symbol" if count == 1 else str(count) + " symbols"
diff --git a/data_scraper/test/test_cboe.py b/data_scraper/test/test_cboe.py
index 6c93b63..204353a 100644
--- a/data_scraper/test/test_cboe.py
+++ b/data_scraper/test/test_cboe.py
@@ -62,7 +62,6 @@ class TestCBOE(unittest.TestCase):
             cboe.fetch_data(["SPX"])
             self.assertTrue(mocked_notification.called)
 
-
     @patch("data_scraper.cboe.utils.remove_file", return_value=None)
     @patch("data_scraper.cboe.send_report", return_value=None)
     def test_data_aggregation(self, mocked_report, mocked_remove):
@@ -109,6 +108,5 @@ class TestCBOE(unittest.TestCase):
         if os.path.exists(file_path):
             shutil.rmtree(file_path)
 
-
 if __name__ == "__main__":
-    unittest.main()
+    unittest.main()
\ No newline at end of file
diff --git a/data_scraper/tiingo.py b/data_scraper/tiingo.py
index 263c6fb..b7e8a5f 100644
--- a/data_scraper/tiingo.py
+++ b/data_scraper/tiingo.py
@@ -109,13 +109,10 @@ def _save_data(symbol, symbol_df):
             merged_df.to_csv(file_path, index=False)
             logger.debug("Saved symbol data as %s", file_path)
 
-
 def _merge(symbol, symbol_df):
     """Merge `symbol_df` with previous data file."""
-
     save_data_path = utils.get_save_data_path()
     symbol_dir = os.path.join(save_data_path, "tiingo", symbol)
-
     files = os.listdir(symbol_dir)
     if len(files) == 0:
         return symbol_df
diff --git a/data_scraper/validation.py b/data_scraper/validation.py
index 369fb0c..6bfc92f 100644
--- a/data_scraper/validation.py
+++ b/data_scraper/validation.py
@@ -9,13 +9,11 @@ from .notifications import slack_notification
 
 logger = logging.getLogger(__name__)
 
-
 def file_hash_matches_data(file_path, data):
     file_hash = file_md5(file_path)
     data_md5 = hashlib.md5(data.encode()).hexdigest()
     return file_hash == data_md5
 
-
 def file_md5(file, chunk_size=4096):
     md5 = hashlib.md5()
     with open(file, "rb") as f:
@@ -24,7 +22,6 @@ def file_md5(file, chunk_size=4096):
 
     return md5.hexdigest()
 
-
 def validate_dates_in_month(symbol, date_range):
     """Compares `date_range` (month) with NYSE trading calendar.
     Returns `True` if there are no missing days.
@@ -46,7 +43,6 @@ def validate_dates_in_month(symbol, date_range):
                      missing_days)
     return missing_days.empty
 
-
 def validate_historical_dates(symbol, date_range):
     """Compares `date_range` (any time range) with trading calendar.
     Returns `True` if there are no missing days.
@@ -67,11 +63,9 @@ def validate_historical_dates(symbol, date_range):
 
     return missing_days.empty
 
-
 def validate_columns(expected, received):
     """Verify that the `received` columns scraped are equal to `expected`"""
     valid = all(expected == received)
-
     if not valid:
         expected_cols = ", ".join(expected)
         received_cols = ", ".join(received)
@@ -80,13 +74,10 @@ def validate_columns(expected, received):
             Received: {}""".format(expected_cols, received_cols)
         logger.error(msg)
         slack_notification(msg, __name__)
-
     return valid
 
-
 def validate_aggregate_file(aggregate_file, daily_files):
     """Compares `aggregate_file` with the data from `daily_files`."""
     aggregate_df = pd.read_csv(aggregate_file)
     recreated_df = cboe.concatenate_files(daily_files)
-
-    return aggregate_df.equals(recreated_df)
+    return aggregate_df.equals(recreated_df)
\ No newline at end of file