Fixed PEP issues

Author: Santhosh18

pandas/tests/series/methods/test_explode.py

@@ -121,8 +121,8 @@ def test_duplicate_index():
 
 
 def test_inferred_dtype():
-    s = pd.Series([1,None,3])
-    df = pd.DataFrame({'A':[s,s,s,s], "B":1})
+    s = pd.Series([1, None, 3])
+    df = pd.DataFrame({'A': [s, s, s, s], "B": 1})
     result = df.explode("A").dtypes.values
     expected = np.array([np.dtype('float64'), np.dtype('int64')])
-    tm.assert_numpy_array_equal(result, expected)
+    tm.assert_numpy_array_equal(result, expected)