张量流中未定义如何固定名称“ null”？

Question

在导入tensorflow时如何解决此错误？

NameError                                 Traceback (most recent call last)
<ipython-input-5-64156d691fe5> in <module>
----> 1 import tensorflow as tf

~\tensorflow.py in <module>
    194   {
    195    "cell_type": "code",
--> 196    "execution_count": null,
    197    "metadata": {},
    198    "outputs": [],

NameError: name 'null' is not defined