As pointed out by @amit-gupta in the question above, sklearn.cross_validation has been deprecated. The function train_test_split can now be found here: Simply replace the import statement from the question to the one above.
The reason Python 3.5 environment is unable to import Tensorflow is that Anaconda does not store the tensorflow package in the same environment. One solution is to create a new separate environment in Anaconda dedicated to TensorFlow with its own Spyder and then install tensorflow into newenvt I found this primer helpful
What 95% of people actually want In most cases what you want to do when you say that you want to update Anaconda is to execute the command: (But this should be preceeded by conda update -n base conda so you have the latest conda version installed) This will update all packages in the current environment to the latest version — … Read more
To remove the configs: Once the configs are removed you can delete the anaconda install folder, which is usually under your home dir: Also, the anaconda-clean –yes command creates a backup in your home directory of the format ~/.anaconda_backup/<timestamp>. Make sure to delete that one also. EDIT (v5.2.0): Now if you want to clean all, … Read more
If you are using windows then go to C: and search for python. A folder with user version number will be shown like ‘Python37’. Open the folder and you’ll see a folder named Scripts, open that, then you’ll find pip.exe. Now copy the folder path and open ‘Edit the system environment variables’ in control panel. … Read more