name_scope¶

paddle.static. name_scope ( prefix=None ) [source]

Api_attr

Static Graph

Generate hierarchical name prefix for the operators in Static Graph.

Note

This should only used for debugging and visualization purpose. Don’t use it for serious analysis such as graph/program transformations. Don’t use it in dygraph, since it will cause memory leak.

Parameters

prefix (str, optional) – prefix. Default is none.

Examples

import paddle
paddle.enable_static()
with paddle.static.name_scope("s1"):
   a = paddle.static.data(name='data', shape=[None, 1], dtype='int32')
   b = a + 1
   with paddle.static.name_scope("s2"):
      c = b * 1
   with paddle.static.name_scope("s3"):
      d = c / 1
with paddle.static.name_scope("s1"):
      f = paddle.tensor.pow(d, 2.0)
with paddle.static.name_scope("s4"):
      g = f - 1

# Op are created in the default main program.
for op in paddle.static.default_main_program().block(0).ops:
    # elementwise_add is created in /s1/
    if op.type == 'elementwise_add':
        assert op.desc.attr("op_namescope") == '/s1/'
    # elementwise_mul is created in '/s1/s2'
    elif op.type == 'elementwise_mul':
        assert op.desc.attr("op_namescope") == '/s1/s2/'
    # elementwise_div is created in '/s1/s3'
    elif op.type == 'elementwise_div':
        assert op.desc.attr("op_namescope") == '/s1/s3/'
    # elementwise_sum is created in '/s4'
    elif op.type == 'elementwise_sub':
        assert op.desc.attr("op_namescope") == '/s4/'
    # pow is created in /s1_1/
    elif op.type == 'pow':
        assert op.desc.attr("op_namescope") == '/s1_1/'