CLN: replace lambdas with named functions so they are labeled in asv (#24629)

Author: qwhelan

asv_bench/benchmarks/ctors.py

@@ -3,17 +3,55 @@
 from pandas import Series, Index, DatetimeIndex, Timestamp, MultiIndex
 
 
+def no_change(arr):
+ return arr
+
+
+def list_of_str(arr):
+ return list(arr.astype(str))
+
+
+def gen_of_str(arr):
+ return (x for x in arr.astype(str))
+
+
+def arr_dict(arr):
+ return dict(zip(range(len(arr)), arr))
+
+
+def list_of_tuples(arr):
+ return [(i, -i) for i in arr]
+
+
+def gen_of_tuples(arr):
+ return ((i, -i) for i in arr)
+
+
+def list_of_lists(arr):
+ return [[i, -i] for i in arr]
+
+
+def list_of_tuples_with_none(arr):
+ return [(i, -i) for i in arr][:-1] + [None]
+
+
+def list_of_lists_with_none(arr):
+ return [[i, -i] for i in arr][:-1] + [None]
+
+
 class SeriesConstructors(object):
 
  param_names = ["data_fmt", "with_index"]
- params = [[lambda x: x,
+ params = [[no_change,
  list,
- lambda arr: list(arr.astype(str)),
- lambda arr: dict(zip(range(len(arr)), arr)),
- lambda arr: [(i, -i) for i in arr],
- lambda arr: [[i, -i] for i in arr],
- lambda arr: ([(i, -i) for i in arr][:-1] + [None]),
- lambda arr: ([[i, -i] for i in arr][:-1] + [None])],
+ list_of_str,
+ gen_of_str,
+ arr_dict,
+ list_of_tuples,
+ gen_of_tuples,
+ list_of_lists,
+ list_of_tuples_with_none,
+ list_of_lists_with_none],
  [False, True]]
 
  def setup(self, data_fmt, with_index):