Web2py 比较 request.vars 元素的一部分 [英] Web2py comparing part of a request.vars element

问题描述

我有一个表格，表格中的行包含带有 _names 和 ID 的 SELECT，如下所示:

I have a form with a table with rows containing SELECTs with _names with IDs attached, like this:

TD_list.append(TD(SELECT(lesson_reg_list, _name='lesson_reg_' + str(student[4]))))

提交表单时，我想提取 student[4] 值 和 request.vars.lesson_reg_student[4] 持有的值.

When the form is submitted I want to extract both the student[4] value and the value held by request.vars.lesson_reg_student[4].

我尝试过类似的方法:

for item in request.vars:
    if item[0:9] == "lesson_reg":
        enrolment_id = int(item[10:])
        code = request.vars.item

我还尝试使用以下方法将 request.vars 视为字典:

I also tried treating request.vars like a dictionary by using:

for key, value in request.vars:
    if key[0:9] == "lesson_reg":
        enrolment_id = int(key[10:])
        code = value

但后来我得到了太多的价值无法解压".如果 request.vars 项目名称的最后一部分可以是任意数字，再加上项目名称本身的子字符串，我该如何检索该项目的值?

but then I got 'too many values to unpack'. How do I retrieve the value of a request.vars item when the last part of its name could be any number, plus a substring of the item name itself?

预先感谢您帮助我.

推荐答案

在 Python 中，切片时，结束索引是排除，所以你的两个切片应该是 0:10code> 和 0:11.为简化起见，您还可以将 .startswith 用于第一个:

In Python, when slicing, the ending index is excluded, so your two slices should be 0:10 and 0:11. To simplify, you can also use .startswith for the first one:

for item in request.vars:
    if item.startswith('lesson_reg'):
        enrolment_id = int(item[11:])
        code = request.vars.item

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