Python path added to $PATH -- cannot find origin
zsh reads from up to 4files on start up
If ZDOTDIR is not set, then the value of HOME is used; this is the usual case.
$ZDOTDIR/.zshenv
$ZDOTDIR/.zprofile
$ZDOTDIR/.zshrc
$ZDOTDIR/.zlogin
You need to look in all of them.
.zshrc is read every time a shell or sub shell is started. .zprofile is read when you start a login shell - ie the first shell you start through terminal, and this is where I would put the PATH changes