import subprocess
_proc = subprocess.Popen('git log --no-color -n 1 --date=iso',
                         shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
try:
    GIT_REVISION_DATE = [x.split('Date:')[1].split('+')[0].strip() for x in
                         _proc.communicate()[0].splitlines() if x.startswith('Date:')][0]
except IndexError:
    GIT_REVISION_DATE = 'unknown'