我正在尝试使用python接口使用tensorflow。我的问题是，即使执行最基本的操作，它们也要花费很长时间（> 5分钟）
当使用从Macports和tensorflow-1.13，tf-nightly和tensorflow2.0 alpha安装的python3.6都使用pip安装时会发生此问题。
这个简单的示例需要超过5分钟的时间来执行。
> ipython
Python 3.6.8 (default, Dec 30 2018, 13:01:27)
In [1]: import numpy as np
In [2]: import tensorflow as tf
In [3]: print(tf.__version__)
1.13.1
In [4]: a = tf.constant(4.0, dtype=tf.float32)
一段时间后，我中断了执行，回溯如下。有人有建议吗？
KeyboardInterrupt
回溯（最近通话最近） 在
----> 1 a = tf.constant(4.0, dtype=tf.float32)
/opt/local/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/tensorflow/python/framework/constant_op.py constant_v1（值，dtype，形状，名称，verify_shape）
177 """
178 return _constant_impl(value, dtype, shape, name, verify_shape=verify_shape,
--> 179 allow_broadcast=False)
180
181
/opt/local/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/tensorflow/python/framework/constant_op.py _constant_impl（值，dtype，形状，名称，verify_shape，allow_broadcast）
287 attrs={"value": tensor_value,
288 "dtype": dtype_value},
--> 289 name=name).outputs[0]
290 return const_tensor
291
/opt/local/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/tensorflow/python/util/deprecation.py在 new_func（* args，** kwargs）
505 'in a future version' if date is None else ('after %s' % date),
506 instructions)
--> 507 return func(*args, **kwargs)
508
509 doc = _add_deprecated_arg_notice_to_docstring(
/opt/local/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/tensorflow/python/framework/ops.py在 create_op（ 解析参数失败 ）
3298 input_types=input_types,
3299 original_op=self._default_original_op,
-> 3300 op_def=op_def)
3301 self._create_op_helper(ret, compute_device=compute_device)
3302 return ret
/opt/local/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/tensorflow/python/framework/ops.py在 init （自身，node_def，g，输入，output_types，control_inputs，input_types，original_op，op_def）
1821 op_def, inputs, node_def.attr)
1822 self._c_op = _create_c_op(self._graph, node_def, grouped_inputs,
-> 1823 control_input_ops)
1824
1825 # Initialize self._outputs.
/opt/local/Library/Frameworks/Python.framework/Versions/3.6/lib/python3.6/site-packages/tensorflow/python/framework/ops.py在 _create_c_op（图形，node_def，输入，control_inputs）
1654 # TODO(skyewm): this creates and deletes a new TF_Status for every attr.
1655 # It might be worth creating a convenient way to re-use the same status.
-> 1656 c_api.TF_SetAttrValueProto(op_desc, compat.as_str(name), serialized)
1657
1658 try:
KeyboardInterrupt：