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不必了 2025-02-03 14:33:59

您不会将 lastEvaledkey 传递到 scan()调用中,因此它每次都从一开始就开始扫描。

将其更改为:

while scan_response.get('LastEvaluatedKey'):
    scan_response = table.scan(
        ExclusiveStartKey=scan_response.get('LastEvaluatedKey'),
        FilterExpression=Attr('id').eq(event['id']) & Attr(
    'name').eq(event['name']) & Attr(
    'role').eq('Manager')
     )

You aren't passing the LastEvaluatedKey into the scan() call, so it is starting the scan over from the beginning each time.

Change it to this:

while scan_response.get('LastEvaluatedKey'):
    scan_response = table.scan(
        ExclusiveStartKey=scan_response.get('LastEvaluatedKey'),
        FilterExpression=Attr('id').eq(event['id']) & Attr(
    'name').eq(event['name']) & Attr(
    'role').eq('Manager')
     )

使用boto3从DynamoDB扫描带有OUT分区键

不必了 2025-02-03 06:10:58

C编译器的常见做法是将所有外部范围计划标识符的领先下划线预先分配,以避免冲突和运行时语言支持的贡献

如果编译器提供了运行时支持,则预先向所有外部范围计划标识符提出了所有外部范围计划标识符,以避免运行时语言支持的贡献,您会认为,您认为预先确定一个下端以进行更有意义运行时支持中的少数外部标识符!

当C编译器首次出现时,这些平台上C编程的基本替代方法是用汇编语言编程,并且(偶尔仍然)将链接在汇编和C中的对象文件链接在一起。在外部C标识符中添加的下划线是避免与您自己的汇编代码中的标识符发生冲突。

(另请参见 gcc的 asm label扩展名;并注意,此预定的条件可以被视为一种简单的形式,即Mangling ,例如C ++使用更复杂的名称。

It was common practice for C compilers to prepend a leading underscore to all external scope program identifiers to avert clashes with contributions from runtime language support

If the runtime support is provided by the compiler, you would think it would make more sense to prepend an underscore to the few external identifiers in the runtime support instead!

When C compilers first appeared, the basic alternative to programming in C on those platforms was programming in assembly language, and it was (and occasionally still is) useful to link together object files written in assembler and C. So really (IMHO) the leading underscore added to external C identifiers was to avoid clashes with the identifiers in your own assembly code.

(See also GCC's asm label extension; and note that this prepended underscore can be considered a simple form of name mangling. More complicated languages like C++ use more complicated name mangling, but this is where it started.)

为什么C编译器会预先指示外部名称?

不必了 2025-02-03 06:06:50

这是有道理的。请注意,django使用 pil 库来处理

Virtualenv中的 图像
PIP安装枕头
在您的 models.py

from PIL import images

图像作为静态文件处理。描述了处理静态文件在这里

This makes sense. Note that django uses the PIL library to handle images

In your virtualenv
pip install pillow
In your models.py

from PIL import images

Images are handled as static files. Handling static files is described here

如何使用图像字段和用户字段作为oneToOneField变量在Django REST框架中保存用户配置文件模型

不必了 2025-02-03 04:16:14

您正在后端使用HTTP,但React App尝试使用HTTPS访问。检查 http-common.js 文件。

baseURL: "https://localhost:8080/api",

更改为HTTP应该有效。

You are using HTTP on the backend side but react app tries to access with HTTPS. Check the http-common.js file.

baseURL: "https://localhost:8080/api",

Changing to HTTP should work.

React前端没有与Spring Boot Rest API通信。控制台中的Axios网络错误

不必了 2025-02-03 03:52:06

CurrentLocation 仍然没有初始化,在您的 initstate()中,您称之为 currentLocation 的实例,该实例仍未在任何地方初始化,除了任何地方在您的 setCurrentLocation()方法中,然后您必须在initstate中调用 setCurrentLocation(),然后您可以将 cerce> CurrentLocation 标记为已晚

当您不想使值不可使值无效时,因为flutter需要确保不需要不必要的值,您要么必须将其标记为一个可确定的值,如果您迟到了,则将其标记为orrr,然后您保证flutter将稍后初始化,现在,如果您标记 CurrentLocation ,这意味着您保证您会在沿线的某个地方给它一个值,并且永远不会是null在UI构建之前,从我所看到的内容之前,它只能在设备访问应用程序以检查用户位置后才获得值通过该过程, currentLocation 的值将为null,直到它获取位置,并且构建器将没有任何内容可以使用UI构建UI,此外,在您的HomeScreen构建方法中,您正在检查是否是否CurturnLocation为null,这意味着您期望它在某个时候为null,这就是为什么建议通过添加问号或标记为date 无效,这意味着它不能保持无效,但是您保证它以后会得到一个值,我的建议是将其位置? CurrentLocation; 意味着在某个时候它将是无效的....

所以要么做,

Position? currentLocation;
OR
late Position currentLocation;

但是使用第二个选项,您必须确保该应用在构建器构建UI之前获得位置,这意味着您将消除圆形播种,

只需这样做

Position? currentLocation;

currentLocation still isn't initialized, in your initState() what you called was the instance of currentLocation which still wasn't initialized anywhere, except in your setCurrentLocation() method, then you have to call the setCurrentLocation() in initState, then you can mark currentLocation as late

Alright so in flutter when you don't want to make a value nullable, because flutter needs to make sure no value is unnecessarily left null, you either have to mark it as a nullable value, orrr mark it as late, if you make it late, then you promise flutter you're going to initialize it later, now if you mark currentLocation as late, it means you promise that you'll give it a value somewhere along the line, and it will never be null before the UI builds and from what I see, it can only get a value after your device gives access to the app to check user location, and then the app grabs it from the device GPS, if you have to do all that, meaning that through that process, the value of currentLocation will be NULL,until it gets location and the builder won't have anything to build the UI with, also, in your HomeScreen build method, you are checking if the currentLocation is null, meaning you expect it to be null at some point, this is why it's advisable to make the currentLocation nullable by adding a question mark, or mark it as late, which means it can't be null, but you promise that it'll get a value later, my advice would be to make it Position? currentLocation; meaning that at some point it will be null....

so either make it

Position? currentLocation;
OR
late Position currentLocation;

but with second option you have to make sure that the app gets the location before the builder builds the UI, meaning you'll eliminate the circularprogressbar,

just do this

Position? currentLocation;

什么是初始化器错误以及如何在Flutte中修复它

不必了 2025-02-02 20:54:13

每当您对事件或属性的回调应该是函数 /方法(名称),而不是它返回的内容。这就是为什么当您做 textbox.bind(text = print(“ test”)) ,您可以做到这一点:print(“ test”))。另请注意,属性回调与Kivy的事件回调不同。

这是该部分的修改版本,

    def add_rm_textboxes(self):  # sourcery skip: use-fstring-for-concatenation
        for i in range(1,21):
            textbox = MDTextField(hint_text=str(i)+" RM",mode="fill",helper_text="Enter your TESTED "+str(i)+" RM",helper_text_mode="on_focus")
            textbox.bind(text = self.callback_method)
#            textbox.bind(text = lambda *args : print("test"))
            textbox.name = "rm"+str(i)
            self.sm.current_screen.ids.pr_grid.add_widget(textbox)


    def callback_method(self, txtbx, txt):
        print(f"{txtbx.text = }, {txt = }, {txtbx.name = }")

Whenever you bind a callback to an event or a property that callback is supposed to be a function / method (name) not what it returns. That's why you got None when you did textbox.bind(text = print("test")), you could've done it like, textbox.bind(text = lambda *args : print("test")). Also note that a property callback is different from an event callback in kivy.

Here is a modified version of that portion,

    def add_rm_textboxes(self):  # sourcery skip: use-fstring-for-concatenation
        for i in range(1,21):
            textbox = MDTextField(hint_text=str(i)+" RM",mode="fill",helper_text="Enter your TESTED "+str(i)+" RM",helper_text_mode="on_focus")
            textbox.bind(text = self.callback_method)
#            textbox.bind(text = lambda *args : print("test"))
            textbox.name = "rm"+str(i)
            self.sm.current_screen.ids.pr_grid.add_widget(textbox)


    def callback_method(self, txtbx, txt):
        print(f"{txtbx.text = }, {txt = }, {txtbx.name = }")

动态设置Kivymd中MDTEXTFIELD的属性

不必了 2025-02-02 04:14:51

shutil.copytree 是递归将目录树复制到新位置的常用方法,并且它具有是否在现有目录上出现错误,遵循Symlinks等等。

但是,并发症是您的目的地是源内部的,这意味着任何递归方法最终都可能开始重新修复新创建的树作为源的一部分Ad Infinitum。

管理此问题的最安全方法是将您的关注目录复制到IT的某些临时目录外部,然后从该中间位置复制到目的地:

import tempfile, shutil
with tempfile.TemporaryDirectory() as temp:
    temp_new = temp + '/new'
    shutil.copytree('..', temp_new)
    shutil.copytree(temp_new, 'new')

shutil.copytree is the usual way to recursively copy a directory tree to a new location, and it has options for whether to error out on existing directories, follow symlinks, and so on.

The complication, however, is that your destination is inside of the source, meaning that any recursive approach may end up beginning to re-copy the newly created tree as part of the source, ad infinitum.

The safest way to manage this is to copy your directory of interest to some temporary directory outside of it, and then copy from that intermediate location to the destination:

import tempfile, shutil
with tempfile.TemporaryDirectory() as temp:
    temp_new = temp + '/new'
    shutil.copytree('..', temp_new)
    shutil.copytree(temp_new, 'new')

Python-创建一个子目录包含父目录中的所有目录和文件

不必了 2025-02-01 09:47:36

它将是 o(n)。分配完成后,您将明确释放内存。我同意 malloc 的内部工作原理是有用的,但是假设正常实现不足以更改空间复杂性(用于跟踪 o(o(n))内存分配它保留 o(n^2)元数据的数量 - 只是一个奇怪的例子)。

一个有趣的观点,可以清除您的想法。如果您评论此免费(..)行,则空间复杂性将为 o(n^2)。这就是所谓的内存泄漏。

It would be O(n). You are explicitly freeing up the memory after the assignment is done. I agree the inner workings of the malloc would be useful but assuming a normal implementation which doesn't use memory enough to change the space complexity ( For tracking O(n) memory allocation it keeps O(n^2) amounts of metadata - just a weird example).

An interesting point, to clear up your idea. If you comment out this free(..) line, then the space complexity would be O(n^2). This is what is known as memory leakage.

循环中最糟糕的空间复杂性,它创建每个迭代

不必了 2025-02-01 06:52:17

经过几个小时的删除模块 /重新启动Pycharm /无效的缓存...我的项目是最新的,没有任何问题!

对于将来的注释:
请勿使用已经存在的软件包命名模块/脚本(例如:Scipy,Seaborn等)

After a few hours of dropping modules/restarting Pycharm / Invalidating cache... My project is up-to date without any issue!

For future note:
Do not name your modules/scripts with an already existing package (eg: scipy, seaborn, and so on)

无法使用Python上的诗歌添加海洋依赖

不必了 2025-02-01 04:58:57

如果这不是实时交易,请使用 https://pielot-payflowlink.paypal.paypal.com

我们正在传递以下字段登录,合作伙伴,金额,类型的测试数据。

您的问题应包括您正在使用的表格和所传递的数据,因为这里的数据可能正是问题所在。


无论如何,为什么您要使用15岁以上的薪水链接,而不是更新的标准贝宝结帐带有黑色借记卡或信用卡按钮? ....

“在此处输入图像描述”

If this is not for a live transaction, use https://pilot-payflowlink.paypal.com

we are passing test data for below fields LOGIN, PARTNER,AMOUNT,TYPE.

Your question should include the form you are using and the data you are passing, since invalid data here may be precisely the problem.


Regardless, why are you using the 15+ year-old Payflow Link instead of the much newer and nicer standard PayPal checkout with its black Debit or Credit Card button? ....

enter image description here

获取无效的商人或商人不存在!打开薪资链接时使用工资流

不必了 2025-02-01 03:41:51

将INTL添加到YAML,然后编写此代码:

import 'package:intl/intl.dart';
void main() {
  var strcandidate = DateTime(2023, 3, 16);
  String format = "MMddyy";
  var originalFormat = DateFormat(format).format(strcandidate);
  print(originalFormat);
}

add the intl to yaml then write this code:

import 'package:intl/intl.dart';
void main() {
  var strcandidate = DateTime(2023, 3, 16);
  String format = "MMddyy";
  var originalFormat = DateFormat(format).format(strcandidate);
  print(originalFormat);
}

整齐地解析“ mmddyy”中的日期格式以及飞镖中的其他格式

不必了 2025-01-31 11:35:20

也将出租车解决为:

df['group_val_id'] = (df.groupby('group')['value'].
                      apply(lambda x:x.astype('category').cat.codes + 1))

df
 
    group value  group_val_id
0       1     a             1
1       1     a             1
2       1     b             2
3       1     b             2
4       1     b             2
5       1     b             2
6       1     c             3
7       2     d             1
8       2     d             1
9       2     d             1
10      2     d             1
11      2     e             2

Also cab be solved as :

df['group_val_id'] = (df.groupby('group')['value'].
                      apply(lambda x:x.astype('category').cat.codes + 1))

df
 
    group value  group_val_id
0       1     a             1
1       1     a             1
2       1     b             2
3       1     b             2
4       1     b             2
5       1     b             2
6       1     c             3
7       2     d             1
8       2     d             1
9       2     d             1
10      2     d             1
11      2     e             2

如何使用Pandas通过小组创建滚动独特的计数

不必了 2025-01-31 11:31:56

首先,您需要将宽度设置为 inline样式如果要检索百分比值,否则您将始终获得像素转换值,并且必须使用一些数学进行转换。
然后,您可以从样式对象中检索 width ,删除符号,执行总和并返回一个新百分比。

select.onchange = e => {
  const width = mwfps.style.width
  mwfps.style.width = +width.replace("%", "") + +e.target.value + "%"
  const newWidth = mwfps.style.width
  mwfps.innerText = newWidth
}
#mwfps {
  background: orange;
  height: 20px;
}
<div id="mwfps" style="width:18%">18%</div>
<select id="select">
  <option value="10">10%</option>
  <option value="20">20%</option>
  <option value="30">30%</option>
  <option value="40">40%</option>
</select>

First you need to set the width as inline style if you want to retrieve the percentage value otherwise you will always get the pixel transformed values and you will have to make the conversion with some math.
Then you can retrieve the width from style object, get rid of % symbol, perform the sum, and return a new percentage.

select.onchange = e => {
  const width = mwfps.style.width
  mwfps.style.width = +width.replace("%", "") + +e.target.value + "%"
  const newWidth = mwfps.style.width
  mwfps.innerText = newWidth
}
#mwfps {
  background: orange;
  height: 20px;
}
<div id="mwfps" style="width:18%">18%</div>
<select id="select">
  <option value="10">10%</option>
  <option value="20">20%</option>
  <option value="30">30%</option>
  <option value="40">40%</option>
</select>

如何添加宽度值以增加x量?

不必了 2025-01-31 09:37:56

您正在使用错误的OAuth流。

您需要一个代表用户的令牌, client_credentials 广义地说不代表用户,而是“服务器”。

因此,使用令牌,您无权阅读 broadcasterid 订阅。因此,未经授权的状态代码失败了403/请求

在此处阅读更多有关官方文档:

您需要一个response_type code> code> code token not /代码>

You are using the wrong oAuth flow.

You need a token that representes a user, client_credentials broadly speaking doesn't represent a user but a "server".

So with your token you do not have permission to read broadcasterId subscriptions. Hence the 403/Request failed with status code Unauthorized

Read more on the official documentation here: https://dev.twitch.tv/docs/authentication#user-access-tokens

You need a response_type code or token not client_credentials

通过Twitch API将用户下载到我的抽搐中

不必了 2025-01-30 23:47:53

您明确地说将“ x”替换为“ val”“ val”返回其“ d”的返回值

x = val (x , 2);

,以便覆盖主'x'

You explicitly said to replace 'x' with the return value from 'val'

x = val (x , 2);

'val' returns its 'd', so that overwrites mains 'x'

malloc()在函数的参数中按值传递的变量完成

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