Operating system: windows10
problem discovery: switch to the tensorflow 2.0.0 installation environment in CMD and enter PIP list. It is found that the corresponding version of tensorflow estimator is 2.5.0, which is inconsistent with the tensorflow version
solution: upgrade or lower the tensorflow estimator to a version consistent with tensorflow
if my version is tensorflow 2.0.0, type CONDA install tensorflow estimator = = 2.0.0 in CMD, and different versions will be seated according to their numbers
as shown in the following figure:

restart the Spyder console and it should be all right