这是我的代码，我有一些问题..
from xml.dom import minidom
openFiles = 'myxml/*.xml'
list = []
for xmlfiles in glob.glob(openFiles):
doc = minidom.parse(xmlfiles)
root = doc.getElementsByTagName("info")[0]
project_name = root.getAttribute('project_name')
list.append(project_name)
....
此代码正常运行。但不知何故，因为我跑来打开多个文件的错误。原因是因为并非所有文件都有＆＃39; info＆＃39;元素。那么有没有办法让它继续运行并将其更改为“没有”？
所以示例就像这样
project1，project2，none，project3，none
抱歉我的英文不好，并提前谢谢
答案 0 :(得分：1)
您可以根据常见的Python编码原则EAFP（比请求更容易请求宽恕）添加$(document).ready(function(){
var modalObj = $('.confirm_modal').courses_modal_box();
$("#confirm").click(function() {
if (v_changeInd === 'N') {
$('.confirm_modal').courses_modal_box({
description: '<p>You have already submitted a request for a preferred first name of: ' + v_oldPFN +
' Please wait for the request to be completed (within 2 business days)</p>' +
'<br><br>' +
'<div style="text-align:center;">' +
'<input type="button" value="Okay" class="courses_modal_close">' +
'</div>' +
'',
width: '600',
height: '300'
});//Second modal
处理，如果XML中没有(function($){
// Defining our jQuery plugin
$.fn.courses_modal_box = function(prop){
// Default parameters
var options = $.extend({
height : "300",
width : "600",
title:" Preferred First Name",
description: "Preferred First Name",
top: "50%",
left: "50%"
},prop);
return this.click(function(e){
add_block_page();
add_popup_box();
add_styles();
$('.courses_modal_box').fadeIn();
});
function add_styles(){
$('.courses_modal_box').css({
'width':'600px',
'height':'300px',
'position': 'absolute', //Keep as absolute
//'top': '50%',
//'left': '50%',
//'top': '400px',
//'left': '500px',
'top': '400',
'right': '400',
'bottom': '400',
'left': '400',
//'display':'center',
'border':'1px solid #000000',
'box-shadow': '0px 2px 7px #292929',
'background': '#f2f2f2',
'vertical-align': 'center',
'-moz-box-shadow': '0px 2px 7px #292929',
'-webkit-box-shadow': '0px 2px 7px #292929',
'-ms-box-shadow': '0px 2px 7px #292929',
'border-radius':'10px',
'-border-radius':'10px',
'-moz-border-radius':'10px',
'-webkit-border-radius':'10px',
'z-index':'50'
});
$('.courses_modal_close').css({
'position':'relative',
'top':'-45px',
'left':'20px',
'float':'center',
'display':'block',
'text-align':'center', //Things I adjusted for the okay button on my modal.
'height':'50px',
'width':'100px',
'vertical-align': 'middle',
// 'border':'2px solid #000000',
'margin':'0 auto' //Centers the button in fireFox
});
/*Block page overlay*/
var pageHeight = $(document).height();
var pageWidth = $(window).width();
$('.courses_block_page').css({
'position':'absolute',
'top':'0',
'left':'0',
//'background-color':'rgba(0,0,8,0.5)',
'height':pageHeight,
'width':pageWidth,
'z-index':'10'
});
$('.courses_inner_modal_box').css({
'position':'initial',
'background-color':'#FFF',
'height':(options.height - 70) + 'px',
'width':(options.width - 60) + 'px',
// 'padding':'10px',
// 'margin-bottom':'-50px',
'margin':'1px',
'border-radius':'10px', //working in fireFox
'-webkit-border-radius':'10px', //chrome
'-border-radius':'10px', //IE
'vertical-align': 'middle',
'text-align': 'center'
}); }
function add_block_page(){
var block_page = $('<div class="courses_block_page"></div>');
$(block_page).appendTo('body');
}
function add_popup_box(){
var pop_up = $('<div class="courses_modal_box"><a href="#" class="courses_modal_close"></a><div style="vertical-align:middle;" class="courses_inner_modal_box"><h2>'
+ options.title + '</h2><p>' + options.description + '</p></div></div>').css({height:"300px"});
$(pop_up).appendTo('.courses_block_page');
$('.courses_modal_close').click(function(){
$(this).parent().fadeOut().remove();
$('.courses_block_page').fadeOut().remove();
});
}
return this;
};
元素，则将处理异常并{{ 1}}将被添加到列表中：
try...except或者您可以使用LBYL（在跳跃之前查看）编码原则并在获取其属性之前检查'info'是否为XML：
None