Recently I was using tensorflow 2.0 to run the code with Jupyter Notebook, and found that I could only find the previously created keras environment.
Found the following solution:
conda install nb_conda
Note here that you need to install it in a designated virtual environment. For example, TF2.0 cannot be found. Just go to the virtual environment of TF2.0 to install.
conda install ipykernel #如果缺少这个包也请下载