CLN: replace lambdas with defs

Author: toobaz

pandas/core/series.py

@@ -3176,7 +3176,8 @@ def apply(self, func, convert_dtype=True, args=(), **kwds):
 
         # handle ufuncs and lambdas
         if kwds or args and not isinstance(func, np.ufunc):
-            f = lambda x: func(x, *args, **kwds)
+            def f(x):
+                return func(x, *args, **kwds)
         else:
             f = func
 

pandas/tests/indexes/test_multi.py

@@ -99,7 +99,8 @@ def test_where_array_like(self):
         cond = [False, True]
 
         for klass in klasses:
-            f = lambda: i.where(klass(cond))
+            def f():
+                return i.where(klass(cond))
             pytest.raises(NotImplementedError, f)
 
     def test_repeat(self):
@@ -2415,7 +2416,8 @@ def check(nlevels, with_nulls):
 
             # with a dup
             if with_nulls:
-                f = lambda a: np.insert(a, 1000, a[0])
+                def f(a):
+                    return np.insert(a, 1000, a[0])
                 labels = list(map(f, labels))
                 index = MultiIndex(levels=levels, labels=labels)
             else: