Select virtualenv for python virtualenv in a directory

select-virtualenv.sh

#!/bin/bash

# Exemple
# Choose your virtualenv for crispml: 
#   1  reader
#   2  curses
#   3  twisted

function select_virtenv() {
echo "$1"
if [ -z "$1" ]; then
    DIR="$(pwd)"
else
    DIR="$1"
fi
    # User input
    echo  -e "\e[33mChoose your virtualenv for crispml: "

    # associative file to a number
    NFILE=1
    declare -A FLIST
    for f in "$DIR/*"; do
        FLIST[$NFILE]=$(basename $f)
        echo -e "\e[96m  $NFILE " ${FLIST[$NFILE]}
        let "NFILE=NFILE+1"
    done
    # User input
    read  -p $'\e[39mEnter the number(q to quit): \e[0m' NUM

    #check for number
    while ! [[ "$NUM" =~ ^[0-9]+$  ]]; do
        if [ "$NUM" = 'q' ] ; then
            return
        else
            read -p $'\e[39mEnter the number(q to quit): \e[0m' NUM
        fi
    done

    # activate
    VEDIR=$DIR/${FLIST[$NUM]}
    if [ -d "$VEDIR" ]; then
        cd "$VEDIR"
        source bin/activate
    fi
}

#select_virtenv
#select_virtenv ~/path/to/dir