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.. _cn_api_fluid_dygraph_guard: guard ------------------------------- .. py:function:: paddle.fluid.dygraph.guard(place=None) 创建一个dygraph上下文,用于运行dygraph。 参数: - **place** (fluid.CPUPlace|fluid.CUDAPlace|None) – 执行场所 返回: None **代码示例** .. code-block:: python import numpy as np import paddle.fluid as fluid with fluid.dygraph.guard(): inp = np.ones([3, 32, 32], dtype='float32') t = fluid.dygraph.base.to_variable(inp) fc1 = fluid.FC('fc1', size=4, bias_attr=False, num_flatten_dims=1) fc2 = fluid.FC('fc2', size=4) ret = fc1(t) dy_ret = fc2(ret)