Centos 安装了 Wkhtmltopdf 却依旧显示 无法打印pdf

def find_in_path(name):
    path = os.environ.get('PATH', os.defpath).split(os.pathsep)
    if config.get('bin_path') and config['bin_path'] != 'None':
        path.append(config['bin_path'])
    try:
        return which(name, path=os.pathsep.join(path))
    except IOError:
        return None

sudo cp /usr/local/bin/wkhtmltopdf /usr/bin/