Set the default to open jupyter notebook from the anaconda path in Mac

Background: Recently all packages of anaconda have been updated and multiple virtual environments have been set up.

Problem: After starting the terminal, input "jupyter notebook" cannot open jupyter, as follows:

$ jupyter notebook
-bash: jupyter: command not found

1. Temporary solution:

(Activate the base environment of conda, the path below is the installation path of anaconda)

$ source ~/anaconda3/bin/activate
(base) ccm ~

Then enter "jupyter notebook" to open the jupyter notebook interface

2. The ultimate solution:

(Set to open the terminal to enter the base environment by default: enter the following code in the terminal, and restart the terminal)

$ conda config --set auto_activate_base true

After that, every time you open the terminal, enter the base environment of conda by default, and directly enter "jupyter notebook" to open the jupyter notebook interface

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