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Iness-MBP:Code_with_Mosh_Python ianchondo$ source /Users/ianchondo/opt/miniconda3/bin/activate
(base) Iness-MBP:Code_with_Mosh_Python ianchondo$ conda activate base
(base) Iness-MBP:Code_with_Mosh_Python ianchondo$ $python3 app.py
bash: app.py: command not found
(base) Iness-MBP:Code_with_Mosh_Python ianchondo$ chsh -s /bin/zsh
Changing shell for ianchondo.
Password for ianchondo:
chsh: Credentials could not be verified, username or password is invalid. Credentials could not be verified, username or password is invalid.
(base) Iness-MBP:Code_with_Mosh_Python ianchondo$
I have no idea where all the other messages come from but here
you added a superfluous $ before python3 telling bash to expand an environment variable named python3 and since this does not exists the resulting command is " app.py" which leads to the error message “bash: app.py: command not found”.