main.py 文件源码

def rs3topng(rs3_filepath, png_filepath=None):
    """Convert a RS3 file into a PNG image of the RST tree.

    If no output filename is given, the PNG image is returned
    as a string (which is useful for embedding).
    """
    try:
        from selenium import webdriver
        from selenium.common.exceptions import WebDriverException
    except ImportError:
        raise ImportError(
            'Please install selenium: pip install selenium')

    html_str = rs3tohtml(rs3_filepath)

    temp = tempfile.NamedTemporaryFile(suffix='.html', delete=False)
    temp.write(html_str.encode('utf8'))
    temp.close()

    try:
        driver = webdriver.PhantomJS()
    except WebDriverException as err:
        raise WebDriverException(
           'Please install phantomjs: http://phantomjs.org/\n' + err.msg)

    driver.get(temp.name)
    os.unlink(temp.name)

    png_str = driver.get_screenshot_as_png()
    if png_filepath:
        with open(png_filepath, 'w') as png_file:
            png_file.write(png_str)
    else:
        return png_str