utils.py 文件源码

def python_version(path_to_python):
    if not path_to_python:
        return None

    try:
        c = delegator.run([path_to_python, '--version'], block=False)
    except Exception:
        return None
    output = c.out.strip() or c.err.strip()

    @parse.with_pattern(r'.*')
    def allow_empty(text):
        return text

    TEMPLATE = 'Python {}.{}.{:d}{:AllowEmpty}'
    parsed = parse.parse(TEMPLATE, output, dict(AllowEmpty=allow_empty))
    if parsed:
        parsed = parsed.fixed
    else:
        return None

    return u"{v[0]}.{v[1]}.{v[2]}".format(v=parsed)