import subprocess

def shellex(cmd, directory, capture=False):
    '''
       Shell Execute:
           Execute any system shell command as non-blocking subprocess.

       Arguments:
           command: str: any shell command
           directory: str: directory where the subprocess will launch
           capture: boolean: store the stdout in a variable for further processing

       Example Usage:
           execute('ls -a', '/')
           execute('afplay music.mp3', '$HOME)
           execute("open -a 'Sublime Text' my_script.py" 'home/Documents')
    '''
    with subprocess.Popen(cmd.split(' '), cwd=directory, stdout=subprocess.PIPE) as process:
        stdout, _ = process.communicate()
        if not capture:
            print(stdout.decode('utf-8'))
        return stdout.decode('utf-8')