install python package conditionally in bash

getrecurly.sh

#!/usr/bin/env bash

ARCHIVE_URL="https://github.com/recurly/recurly-client-python/tarball/master"
ARCHIVE_NAME="recurly.tar.gz"

if ! python -c 'import recurly' &> /dev/null; then
    TMP_DIR=$(mktemp -d XXXXX)
    pushd "$TMP_DIR"
    wget "$ARCHIVE_URL" -O "$ARCHIVE_NAME"
    tar --strip-components 1 -xf "$ARCHIVE_NAME"
    find . -type f -name 'setup.py' -exec python {} install \;
    rm "$ARCHIVE_NAME"
    popd
    rm -rf "$TMP_DIR"
fi

this kinda works. it doesn't fully work because their setup.py doesn't install the package's dependencies automatically, but if you have the prereqs it works. kinda a shitty solution, but it's a good example of shell exit codes and the -c flag for the python interpreter.