fix bug in LogicalOpTransformer: Create logic node recursively (#24785)

python/paddle/fluid/dygraph/dygraph_to_static/loop_transformer.py

@@ -109,8 +109,10 @@ class LogicalOpTransformer(gast.NodeTransformer):
             len(nodes))
         if len(nodes) > 2:
             # Creates logic_and/logic_or node recursively.
-            pre_assign_node = self._create_bool_op_node(nodes[:2], api_type)
-            nodes = [pre_assign_node] + nodes[2:]
+            pre_logic_node = self._create_bool_op_node(nodes[:2], api_type)
+            post_logic_node = self._create_bool_op_node(nodes[2:], api_type)
+            nodes = [pre_logic_node] + [post_logic_node]
+
         args = [ast_to_source_code(child) for child in nodes]
         new_node_str = "fluid.layers.logical_{}(x={}, y={})".format(
             api_type, args[0], args[1])

python/paddle/fluid/tests/unittests/dygraph_to_static/test_loop.py

@@ -85,7 +85,7 @@ def while_loop_bool_op(x):
     # Use `to_variable` so that static analysis can analyze the type of X is Tensor
     x = fluid.dygraph.to_variable(
         x)  # TODO(liym27): Delete it if the type of parameter x can be resolved
-    while (x >= 0 and x < 10) or x <= -1 or x < -3 or (x < -7 or x < -5):
+    while x <= -1 or x < -3 or (x < -7 or x < -5) or (x >= 0 and x < 10):
         i = i + x
         x = x + 1
     return i