有没有办法一次进行多个不同的字符串更换？

发布于 2025-02-02 05:40:16 字数 1143 浏览 1 评论 0 原文

由于我们被排除在使用任何网络报废库之外

def print_ticket():
    if event.get() == 1:
        web_page = urlopen(url1)
        html_code = web_page.read().decode("UTF-8")
        web_page.close()
        event_title = findall('<h6.*>(.+)</h6>', html_code)[0]
        event_image = findall('<img.* src="([^"]+)".*>', html_code)[4]
        event_url = 'https://suncorpstadium.com.au/what-s-on.aspx'
        event_details = findall('<h7.*>(.+)</h7>', html_code)[1]
        filename = event_title.replace(' ', '_') + '_Ticket.html'
        html_file = open(filename, 'w')
        html_file.write(ticket_template.replace('EVENT TITLE', event_title + ' Ticket'))
        html_file.write(ticket_template.replace('IMAGE', event_image))
        html_file.write(ticket_template.replace('DATE TIME', event_details))

我正在做大学作业，该事件在我的GUI中，我的Web文档打印了3个不同的模板集，每个部分都在一个部分上替换。

有没有一种方法可以立即制作多个 .replaces 而没有打印我的模板的多个副本？

原文

I am doing a university assignment and since we are excluded from using any web scrapping libraries, I am limited to regex, I have the current code written (excuse the poor formatting, I am still very new):

def print_ticket():
    if event.get() == 1:
        web_page = urlopen(url1)
        html_code = web_page.read().decode("UTF-8")
        web_page.close()
        event_title = findall('<h6.*>(.+)</h6>', html_code)[0]
        event_image = findall('<img.* src="([^"]+)".*>', html_code)[4]
        event_url = 'https://suncorpstadium.com.au/what-s-on.aspx'
        event_details = findall('<h7.*>(.+)</h7>', html_code)[1]
        filename = event_title.replace(' ', '_') + '_Ticket.html'
        html_file = open(filename, 'w')
        html_file.write(ticket_template.replace('EVENT TITLE', event_title + ' Ticket'))
        html_file.write(ticket_template.replace('IMAGE', event_image))
        html_file.write(ticket_template.replace('DATE TIME', event_details))

My issue is, everytime I run that that event in my GUI, my web document prints 3 different sets of my template with the .write replaces occurring on one per section.

Is there a way to make multiple .replaces at once without it printing multiple copies of my template?

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日暮斜阳 2025-02-09 05:40:16

问题在于您正在调用 Write 3次，您只需要调用一次即可。因此，您可以做什么：

        ticket_template = ticket_template.replace('EVENT TITLE', event_title + ' Ticket')
        ticket_template = ticket_template.replace('IMAGE', event_image)
        ticket_template = ticket_template.replace('DATE TIME', event_details)
        html_file.write(ticket_template)

这样它将起作用，您只会拥有 ticket_template 的最终输出。另外，您可以将其减少到单线，但看起来不会清晰

html_file.write(ticket_template.replace('EVENT TITLE', event_title + ' Ticket').replace('IMAGE', event_image).replace('DATE TIME', event_details))

The problem is that you are calling write 3 times and you need to call it just once. So what you could do:

        ticket_template = ticket_template.replace('EVENT TITLE', event_title + ' Ticket')
        ticket_template = ticket_template.replace('IMAGE', event_image)
        ticket_template = ticket_template.replace('DATE TIME', event_details)
        html_file.write(ticket_template)

in that way it will work, and you will only have the final output of the ticket_template. Also you can reduce this to a one-liner but it won't look legible

html_file.write(ticket_template.replace('EVENT TITLE', event_title + ' Ticket').replace('IMAGE', event_image).replace('DATE TIME', event_details))

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千里故人稀 2025-02-09 05:40:16

您可以使用“ f-string”或文字。为了控制其评估，必须指定它为从a “ nofollow noreferrer”> ） lambda 函数如下所示。请注意，使用的变量名称不必为 all_caps ，如图所示 - 我只是这样做的，使其更容易发现使用它们的位置。

ticket_template = lambda: f'''\
Congratulations! Your ticket to {EVENT_TITLE} has been booked!
{IMAGE}
{DATE} {TIME}
'''

filename = 'whatever.html'

with open(filename, 'w') as html_file:

    EVENT_TITLE = 'Some event title'
    IMAGE = 'Picture of event'
    DATE, TIME = '29/05', '4:00 PM'

    filled_in_ticket = ticket_template()  # *Call* the lambda function.
    html_file.write(filled_in_ticket)

print('fini')

You can do it using an "f-string" or Formatted string literal which was introduced in Python 3.6. To control its evaluation, it must be specified as the result returned from a lambda function as shown in the sample code below.
Note that the variable names used do not have to be ALL_CAPS as shown — I only did it that way to make it easier to spot where they're being used.

ticket_template = lambda: f'''\
Congratulations! Your ticket to {EVENT_TITLE} has been booked!
{IMAGE}
{DATE} {TIME}
'''

filename = 'whatever.html'

with open(filename, 'w') as html_file:

    EVENT_TITLE = 'Some event title'
    IMAGE = 'Picture of event'
    DATE, TIME = '29/05', '4:00 PM'

    filled_in_ticket = ticket_template()  # *Call* the lambda function.
    html_file.write(filled_in_ticket)

print('fini')

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