[pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

Author: pre-commit-ci[bot]

docs/tracing_ext-demo.py

@@ -2,36 +2,37 @@
 import pandas_flavor as pf
 import time
 
+
 @pf.register_dataframe_method
 def my_method(df: pd.DataFrame) -> pd.DataFrame:
     print("my_method called")
     return df.transpose()
 
+
 @pf.register_dataframe_method
 def another_method(df: pd.DataFrame, new_col_d) -> pd.DataFrame:
     print("another_method called")
     for col, v in new_col_d.items():
         df[col] = v
     return df
 
+
 class tracer:
     @staticmethod
     def create_tracer(*args):
         return tracer()
-    
+
     def __init__(self):
         self.method_name = None
         self.start_ts = None
         self.end_ts = None
-        
+
     def __enter__(self):
         return self
-        
-    def handle_start_method_call(self,
-                                 method_name,
-                                 method_signature,
-                                 method_args,
-                                 method_kwagrs):
+
+    def handle_start_method_call(
+        self, method_name, method_signature, method_args, method_kwagrs
+    ):
         self.method_name = method_name
         self.start_ts = time.time()
         return method_args, method_kwagrs
@@ -46,5 +47,5 @@ def __exit__(self, exc_type, value, traceback):
 
 pf.register.method_call_ctx_factory = tracer.create_tracer
 s_df = pd.DataFrame([[i + j for i in range(10)] for j in range(10)])
-res_df = s_df.my_method().another_method({'new_col': 'new value'})
+res_df = s_df.my_method().another_method({"new_col": "new value"})
 print(res_df)