fixed linting and a doctest

Author: smartvinnetou

pandas/core/generic.py

@@ -1,7 +1,6 @@
 from __future__ import annotations
 
 import collections
-from datetime import timedelta
 import functools
 import gc
 from io import StringIO
@@ -26,13 +25,14 @@
     Union,
     cast,
 )
-import warnings
-import weakref
 
 import numpy as np
 
+import pandas as pd
+import pandas.core.algorithms as algos
+import pandas.core.common as com
+import pandas.core.indexing as indexing
 from pandas._config import config
-
 from pandas._libs import lib
 from pandas._libs.tslibs import Tick, Timestamp, to_offset
 from pandas._typing import (
@@ -53,17 +53,9 @@
 from pandas.compat import set_function_name
 from pandas.compat._optional import import_optional_dependency
 from pandas.compat.numpy import function as nv
-from pandas.errors import AbstractMethodError, InvalidIndexError
-from pandas.util._decorators import (
-    doc,
-    rewrite_axis_style_signature, Appender,
-)
-from pandas.util._validators import (
-    validate_bool_kwarg,
-    validate_fillna_kwargs,
-    validate_percentile,
-)
-
+from pandas.core import missing, nanops
+from pandas.core.base import PandasObject, SelectionMixin
+from pandas.core.construction import create_series_with_explicit_dtype
 from pandas.core.dtypes.common import (
     ensure_int64,
     ensure_object,
@@ -98,7 +90,6 @@
 from pandas.core.indexes.api import Index, MultiIndex, RangeIndex, ensure_index
 from pandas.core.indexes.datetimes import DatetimeIndex
 from pandas.core.indexes.period import Period, PeriodIndex
-import pandas.core.indexing as indexing
 from pandas.core.internals import BlockManager
 from pandas.core.missing import find_valid_index
 from pandas.core.ops import align_method_FRAME
@@ -10704,7 +10695,7 @@ def transform(self, func, *args, **kwargs):
 
         Examples
         --------
-        >>> df = pd.DataFrame({{'A': range(3), 'B': range(1, 4)}})
+        >>> df = pd.DataFrame(dict(A=range(3), B=range(1, 4)))
         >>> df
            A  B
         0  0  1