added python_pip_install_if_absent.sh

python_pip_install_if_absent.sh

@@ -0,0 +1,41 @@
+#!/usr/bin/env bash
+#  vim:ts=4:sts=4:sw=4:et
+#
+#  Author: Hari Sekhon
+#  Date: 2019-02-15 13:56:24 +0000 (Fri, 15 Feb 2019)
+#
+#  https://github.com/harisekhon/bash-tools
+#
+#  License: see accompanying Hari Sekhon LICENSE file
+#
+#  If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
+#
+#  https://www.linkedin.com/in/harisekhon
+#
+
+set -euo pipefail
+[ -n "${DEBUG:-}" ] && set -x
+
+if [ $# == 0 ]; then
+    echo "usage: ${0##*/} <filename> <filename> ..."
+    exit 1
+fi
+
+echo "Installing any Python PyPI Modules not already present"
+
+pip_modules="$(sed 's/#.*//;/^[[:space:]]*$$/d' "$@")"
+
+SUDO=""
+if [ $EUID != 0 -a -z "${VIRTUAL_ENV:-}" -a -z "${CONDA_DEFAULT_ENV:-}" ]; then
+    SUDO=sudo
+fi
+
+for pip_module in $pip_modules; do
+    python_module="$(sed '
+        s/[>=].*$//;
+        s/beautifulsoup4/bs4/;
+        s/requests-kerberos/requests_kerberos/;
+        s/PyYAML/yaml/;
+    ' <<< "$pip_module")"
+    python -c "import $python_module" || ${SUDO} ${PIP:-pip} install --ignore-installed urllib3 "$pip_module"
+done