diff --git a/apex/contrib/openfold_triton/layer_norm.py b/apex/contrib/openfold_triton/layer_norm.py
index 7d9c6242a..881137eca 100644
--- a/apex/contrib/openfold_triton/layer_norm.py
+++ b/apex/contrib/openfold_triton/layer_norm.py
@@ -46,7 +46,9 @@ def forward(ctx, inputs, normalized_shape, weight, bias, eps=1e-05):
         x_mean = torch.empty(M, dtype=torch.float32, device=inputs.device)
         y = torch.empty(inputs.shape, dtype=inputs.dtype, device=inputs.device)
 
-        grid = lambda kwargs: (triton.cdiv(kwargs["M"], kwargs["M_BLOCK"]),)
+        def grid(kwargs):
+            return (triton.cdiv(kwargs["M"], kwargs["M_BLOCK"]),)
+
         if inputs.is_contiguous():
             _layer_norm_forward[grid](
                 x_ptr=inputs,
@@ -96,7 +98,9 @@ def backward(ctx, d_y):
 
         # %% Separated kernels, similar to Inductor.
         # 1. dX.
-        grid = lambda kwargs: (triton.cdiv(kwargs["M"], kwargs["M_BLOCK"]),)
+        def grid(kwargs):
+            return (triton.cdiv(kwargs["M"], kwargs["M_BLOCK"]),)
+
         if inputs.is_contiguous():
             _layer_norm_backward_dx[grid](
                 dy_ptr=d_y,
@@ -134,10 +138,13 @@ def backward(ctx, d_y):
         M_BUFSIZE = _M_BUFSIZE_CACHE.get(key, triton.cdiv(M, PARTIAL_REDUCE_MIN))
         dw_partial_buf = torch.empty([N, M_BUFSIZE], dtype=torch.float32, device=d_y.device)
         db_partial_buf = torch.empty([N, M_BUFSIZE], dtype=torch.float32, device=d_y.device)
-        grid = lambda kwargs: (
-            triton.cdiv(M, kwargs["M_PARTIAL_REDUCE"]),
-            triton.cdiv(N, kwargs["N_BLOCK"]),
-        )
+
+        def grid(kwargs):
+            return (
+                triton.cdiv(M, kwargs["M_PARTIAL_REDUCE"]),
+                triton.cdiv(N, kwargs["N_BLOCK"]),
+            )
+
         if inputs.is_contiguous():
             _layer_norm_backward_dw_db_partial[grid](
                 dy_ptr=d_y,
diff --git a/apex/contrib/openfold_triton/mha.py b/apex/contrib/openfold_triton/mha.py
index 9065b6ca8..e19df31e9 100644
--- a/apex/contrib/openfold_triton/mha.py
+++ b/apex/contrib/openfold_triton/mha.py
@@ -158,7 +158,10 @@ def forward(ctx, q, k, v, mask=None, bias=None, inf=1000000000.0, is_training=Tr
         o = torch.empty_like(q)
 
         Z, H, N_CTX, H_DIM = q.shape
-        grid = lambda META: (triton.cdiv(N_CTX, META["BLOCK_M"]), Z * H)
+
+        def grid(META):
+            return (triton.cdiv(N_CTX, META["BLOCK_M"]), Z * H)
+
         l = torch.empty(
             (q.shape[-4], q.shape[-3], q.shape[-2]),
             device=q.device,
@@ -305,11 +308,14 @@ def backward(ctx, do):
 
         # BLOCK_M, BLOCK_N = 128, 64
         BLOCK_M, BLOCK_N, num_warps, num_stages = schedule_triton_mha(list(q.shape), fwd=False)
+
         # grid = lambda META: (triton.cdiv(N_CTX, META["BLOCK_N"]), Z * H)
         # grid = lambda META: (Z * H, triton.cdiv(N_CTX, META["BLOCK_N"]))
         # grid = lambda META: (triton.cdiv(N_CTX, META["BLOCK_N"]) if META["SEQUENCE_PARALLEL"] else 1,
         #            Z * H)
-        grid = lambda META: (Z * H,)
+        def grid(META):
+            return (Z * H,)
+
         _bwd_kernel[grid](
             q,
             k,
diff --git a/examples/imagenet/main_amp.py b/examples/imagenet/main_amp.py
index 384e5bda9..c12591281 100644
--- a/examples/imagenet/main_amp.py
+++ b/examples/imagenet/main_amp.py
@@ -205,7 +205,8 @@ def resume():
         train_sampler = torch.utils.data.distributed.DistributedSampler(train_dataset)
         val_sampler = torch.utils.data.distributed.DistributedSampler(val_dataset)
 
-    collate_fn = lambda b: fast_collate(b, memory_format)
+    def collate_fn(b):
+        return fast_collate(b, memory_format)
 
     train_loader = torch.utils.data.DataLoader(
         train_dataset, batch_size=args.batch_size, shuffle=(train_sampler is None),
diff --git a/pyproject.toml b/pyproject.toml
index 952f4df66..c041d414b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -9,7 +9,6 @@ build-backend = "setuptools.build_meta"
 line-length = 100
 ignore = [
     # Sorted by occurrence count (ascending) - easier to fix first
-    "E731",  # lambda assignment (6 occurrences)
     "E721",  # type comparison should use isinstance (8 occurrences)
     "E741",  # ambiguous variable name (8 occurrences)
     "E712",  # comparison to True/False (9 occurrences)