NotImplementedError: Cannot convert a symbolic Tensor报错与解决
环境：
TensorFlow2.3.0
报错信息：
NotImplementedError: Cannot convert a symbolic Tensor (sequential/simple_rnn/strided_slice:0) to a numpy array. This error may indicate that you’re trying to pass a Tensor to a NumPy call, which is not supported
解决方法：
numpy版本过高，conda安装指定版本的numpy 1.19.2即可解决问题
# 方法一
conda search numpy
conda install numpy=1.19.2 -c conda-forge
# 方法二
pip install numpy==1.19.2