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

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

docs/tracing_ext-demo.py

@@ -1,4 +1,5 @@
 """Tracing extension demo."""
+
 import time
 
 import pandas as pd

pandas_flavor/__init__.py

@@ -1,4 +1,5 @@
 """Top-level API for pandas-flavor."""
+
 from .register import (
     register_dataframe_accessor,
     register_dataframe_method,

pandas_flavor/__version__.py

@@ -1,2 +1,3 @@
 """Version number."""
+
 __version__ = "0.6.0"

pandas_flavor/register.py

@@ -1,4 +1,5 @@
 """Register functions as methods of Pandas DataFrame and Series."""
+
 from functools import wraps
 from pandas.api.extensions import (
     register_series_accessor,

pandas_flavor/xarray.py

@@ -1,4 +1,5 @@
 """XArray support for pandas_flavor."""
+
 from xarray import register_dataarray_accessor, register_dataset_accessor
 from functools import wraps
 

setup.py

@@ -1,4 +1,5 @@
 """Setup script."""
+
 import io
 import os
 import sys

tests/test_pandas_register.py

@@ -1,4 +1,5 @@
 """Tests for pandas series and dataframe method registration."""
+
 import pandas_flavor as pf
 import pandas as pd