fix(python): avoid local packages load

Closes #12535

plugins/python/python.plugin.zsh

@@ -44,7 +44,7 @@ function pyuserpaths() {
 alias pygrep='grep -nr --include="*.py"'
 
 # Run proper IPython regarding current virtualenv (if any)
-alias ipython='python3 -c "import IPython, sys; sys.exit(IPython.start_ipython())"'
+alias ipython='python3 -c "import sys; del sys.path[0]; import IPython; sys.exit(IPython.start_ipython())"'
 
 # Share local directory as a HTTP server
 alias pyserver="python3 -m http.server"