如何在列表中提取字符串的一部分并将其更改为int。 [英] How do I extract a part of a string in a list and change it into an int.

问题描述

所以我有一份清单：

So i have a list of list:

[['Musique', 'Shawn Phillips', '2018-08-24', '2018-08-24'], ['Musique', "L'avenue Royale fête l'été!", '2018-08-25', '2018-08-25'], ['Musique', 'Perséides musicales', '2018-08-03', '2018-08-03'], ['Musique', 'Gaétan Leclerc chante Félix et…', '2018-08-17', '2018-08-17'], ['Musique', 'The Ring of Fire : a Johnny Cash Experience', '2018-07-21', '2018-07-21'],

我只想提取每个列表的月份和日期，我想在另一个函数中使用它们。但我很难解读几个月和几天。



我需要把它们放在这个功能中：

Im looking to extract only the months and days of every lists and i want to use them in another function. but im having a hard time extracting the months and days only.

I need to put them in this function :

def obtain_date(date):

列表list实际上也是另一个函数 obtain_events 并且在我提取了我的月/天之后，我将不得不找到另一个函数的确切天数，但我主要关注的是找到我的能力仅在我的 obtain_date（date）：函数中只有一个参数时提取月份和日期。此外，在我提取月份/天之后（或之前），我需要将它们更改为int，因为它们目前是字符串形式。



我尝试过：



尝试了几个循环，例如：

the list of lists is actually another function too obtain_events and after i extracted my months/days, im gonna have to find the exact days with another function, but im mostly focused on finding how i can extract the months and days only while having only 1 argument in my obtain_date(date): function. Also, after( or before) i extract the months/days, i need to change them to int, as they are currently in a form of strings.

What I have tried:

Tried a few loops like:

for element in obtain_events:
           if '2018' in element:
                 element.remove(2018)

但它没有用，我也尝试了一些其他的循环，但我很困惑。

But it didnt work and i also tried a few other loops but im getting confused.

推荐答案

for element in obtain_events:
           if '2018' in element:
                 numbers = element.split('-')
                 ...

变量数字将包含以下内容： ['2018'，'08'，'24'] 。您现在可以对每个字段执行所需的操作，必要时将它们转换为整数值。

The variable numbers will be a list containing something like: [ '2018', '08', '24' ]. You can now do what you want with each field, if necessary converting them to integer values.

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