How to start python or ipython with packages pre-imported.

Instead of every time you execute python or ipython, have to write "import os" or other common packages, this script will start python with these packages imported

#!/usr/bin/env bash
# -------------------------------------------------------------
#  Calls ipython or python3 with multiple packages imported
# -------------------------------------------------------------

if [[ -z "$1" ]] || [[ -f "$1" ]]; then
    [[ -n "$(command -v ipython3)" ]] && EXEC="ipython3" || EXEC=python3
    TMP_PY=/$TMPDIR/$EXEC.py
    printf "import os, re, sys, math, datetime, yaml\n" >$TMP_PY
    $EXEC -i $TMP_PY "$@"
else
    python3 "$@"
fi

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