Maybe you want to try this: https://bootstrap-datepicker.readthedocs.org/en/latest/index.html

It&#39;s a flexible datepicker widget in the Bootstrap style.

You can use this and then you can add just a `class` form from bootstrap. 
&lt;sup&gt;*(does not matter which version)*&lt;/sup&gt;

    &lt;div class=&quot;form-group&quot;&gt;
     &lt;label &gt;Begin voorverkoop periode&lt;/label&gt;
     &lt;input type=&quot;date&quot; name=&quot;bday&quot; max=&quot;3000-12-31&quot; 
            min=&quot;1000-01-01&quot; class=&quot;form-control&quot;&gt;
    &lt;/div&gt;
    &lt;div class=&quot;form-group&quot;&gt;
     &lt;label &gt;Einde voorverkoop periode&lt;/label&gt;
     &lt;input type=&quot;date&quot; name=&quot;bday&quot; min=&quot;1000-01-01&quot;
            max=&quot;3000-12-31&quot; class=&quot;form-control&quot;&gt;
    &lt;/div&gt;

Most of bootstrap datepickers as I write this answer are rather buggy when included in Bootstrap 4.
In my view the least code adding solution is a jQuery plugin.
I used this one https://plugins.jquery.com/datetimepicker/ - you can see its usage here: https://xdsoft.net/jqplugins/datetimepicker/
It sure is not as smooth as the whole BS interface, but it only requires its css and js files along with jQuery which is already included in bootstrap.

Let&#39;s say we have a dummy function:

    async def foo(arg):
        result = await some_remote_call(arg)
        return result.upper()

What&#39;s the difference between:

    import asyncio    

    coros = []
    for i in range(5):
        coros.append(foo(i))

    loop = asyncio.get_event_loop()
    loop.run_until_complete(asyncio.wait(coros))

And:

    import asyncio

    futures = []
    for i in range(5):
        futures.append(asyncio.ensure_future(foo(i)))

    loop = asyncio.get_event_loop()
    loop.run_until_complete(asyncio.wait(futures))

*Note*: The example returns a result, but this isn&#39;t the focus of the question. When return value matters, use `gather()` instead of `wait()`.

Regardless of return value, I&#39;m looking for clarity on `ensure_future()`. `wait(coros)` and `wait(futures)` both run the coroutines, so when and why should a coroutine be wrapped in `ensure_future`?

Basically, what&#39;s the Right Way (tm) to run a bunch of non-blocking operations using Python 3.5&#39;s `async`?

For extra credit, what if I want to batch the calls? For example, I need to call `some_remote_call(...)` 1000 times, but I don&#39;t want to crush the web server/database/etc with 1000 simultaneous connections. This is doable with a thread or process pool, but is there a way to do this with `asyncio`?

**2020 update (Python 3.7+)**: Don&#39;t use these snippets. Instead use:

    import asyncio

    async def do_something_async():
        tasks = []
        for i in range(5):
            tasks.append(asyncio.create_task(foo(i)))
        await asyncio.gather(*tasks)

    def do_something():
        asyncio.run(do_something_async)

Also consider using [Trio][1], a robust 3rd party alternative to asyncio.


  [1]: https://trio.readthedocs.io/

Difference between coroutine and future/task in Python 3.5?

Just installed a package through anaconda (`conda install graphviz`), but ipython wouldn&#39;t find it.

I can see a graphviz folder in `C:\Users\username\Anaconda\pkgs`

But there&#39;s nothing in: `C:\Users\username\Anaconda\Lib\site-packages`


[![still wouldn&#39;t work][1]][1]


  [1]: http://i.stack.imgur.com/JlMH9.png


anaconda - graphviz - can&#39;t import after installation

I&#39;m using Bootstrap V4 for my new website seeing that it is in Alpha. 

However I cannot see that it has datepicker.js in its build.

Does anyone know if this will be included in V4? If not can anyone recommend a good datepicker?


Bootstrap 4 datapicker.js not included

I'm using Bootstrap V4 for my new website seeing that it is in Alpha.
However I cannot see that it has datepicker.js in its build.
Does anyone know if this will be included in V4? If not can anyone recommend a good datepicker?

I just migrated to bootstrap 4 and my xs buttons no longer seem to be extra small!

Looking at the [docs for buttons in bootstrap 4][1] I don&#39;t see the option for extra small buttons?

Can anyone confirm this for me?

Thanks!


  [1]: http://v4-alpha.getbootstrap.com/components/buttons/

btn-xs no longer a valid option in bootstrap 4?

I&#39;m playing with Bootstrap 4 and I can&#39;t find a solution to add responsiveness to cards while in a `div` with `class=&quot;card-columns&quot;` (this class applies a Masonry-like effect to the cards inside the div having this class).

In Bootstrap 3 it was *easy* to style and make &quot;cards&quot; responsive since it was possible to apply something like `class=&quot;col-md-3 col-sm-6 col-xs-12&quot;` to a div containing `thumbnail`, `caption`, etc.

How to have the same effect while using cards in Bootstrap 4?

Here is the HTML:

```html
&lt;body&gt;

&lt;div class=&quot;container-fluid&quot;&gt;
    &lt;div class=&quot;row&quot;&gt;

        &lt;div class=&quot;col-md-4 hidden-sm-down&quot; id=&quot;map_container&quot;&gt;
            &lt;p&gt;here we put the map&lt;/p&gt;
        &lt;/div&gt;

        &lt;div class=&quot;col-md-8 col-sm-12 right_box&quot;&gt;

            &lt;div class=&quot;row&quot;&gt;

                // here there&#39;s code for navbar

            &lt;/div&gt;&lt;!-- row --&gt;

            &lt;div class=row&quot;&gt;
                &lt;div class=&quot;card-columns&quot;&gt;
                    &lt;?php
                    // Create and check connection
                    
                    if ($result-&gt;num_rows &gt; 0) {

                        // output card design
                        while($row = $result-&gt;fetch_assoc()) {

                            echo &#39;&lt;div class=&quot;card&quot;&gt;
                                    &lt;img class=&quot;card-img-top&quot; src=&quot;dance&#39; . $row[&quot;id&quot;] . &#39;.jpg&quot; alt=&quot;&#39; . $row[&quot;name&quot;] . &#39;&quot;&gt;
                                    &lt;div class=&quot;card-block&quot;&gt;
                                        &lt;h4 class=&quot;card-title&quot;&gt;&#39; . $row[&quot;name&quot;] . &#39;&lt;/h4&gt;
                                        &lt;p class=&quot;card-text&quot;&gt;Text. Card content.&lt;/p&gt;
                                    &lt;/div&gt;
                                    &lt;div class=&quot;card-footer text-muted&quot;&gt;
                                        &lt;ul class=&quot;list-inline&quot;&gt;
                                            &lt;li&gt;&lt;i class=&quot;fa fa-user&quot;&gt;&lt;/i&gt;&lt;/li&gt;
                                            &lt;li&gt;14&lt;/li&gt;
                                        &lt;/ul&gt;
                                    &lt;/div&gt;
                                  &lt;/div&gt;&lt;!-- card --&gt;&#39;;
                        }
                    } else {
                        echo &quot;0 results&quot;;
                    }

                    $conn-&gt;close();
                    ?&gt;
                &lt;/div&gt;&lt;!-- container card-columns --&gt;
            &lt;/div&gt;&lt;!-- row --&gt;
        &lt;/div&gt;&lt;!-- col-md-8 right_box --&gt;
    &lt;/div&gt;&lt;!-- row --&gt;
&lt;/div&gt;&lt;!-- container-fluid --&gt;
&lt;/body&gt;
```

And here is the CSS I&#39;ve used:

```css
#map_container {
background-image: url(map.png);
height: 100vh;
}

.right_box {
-webkit-box-shadow: -2px 0px 2px 0px rgba(0,0,0,0.75);
-moz-box-shadow: -2px 0px 2px 0px rgba(0,0,0,0.75);
box-shadow: -2px 0px 2px 0px rgba(0,0,0,0.75);
}

.card {
border-radius: 0 !important;
border: 0 none;
-webkit-box-shadow: 0px 2px 5px 0px rgba(0,0,0,0.5);
-moz-box-shadow: 0px 2px 5px 0px rgba(0,0,0,0.5);
box-shadow: 0px 2px 5px 0px rgba(0,0,0,0.5);
margin-left: 1px;
margin-right: 1px;
}

.card-img-top {
width: 100%;
border-radius: 0 !important;
}

.card-columns {
padding-top: 15px;
}
```

Given below are two images to make my situation clearer:

[Large screen][1]

[Smaller screen][2]

I&#39;d like cards to stack up vertically on smaller screens.

Thanks for your suggestions!

  [1]: http://i.stack.imgur.com/FUVPN.jpg
  [2]: http://i.stack.imgur.com/Bkaou.png

Bootstrap 4 - Responsive cards in card-columns

The last column of the first row is wrapped to the next line when viewing in Safari, and some other iOS based browsers.

**Safari:**

[![enter image description here][1]][1]

**Chrome / Others:**

[![enter image description here][2]][2]

**Code:**
     

&lt;!-- begin snippet: js hide: false console: true babel: false --&gt;

&lt;!-- language: lang-css --&gt;

    .flexthis {
      display: -webkit-box;
      display: -webkit-flex;
      display: -ms-flexbox;
      display: flex;
      -webkit-flex-wrap: wrap;
      -ms-flex-wrap: wrap;
      flex-wrap: wrap;
    }

    .flexthis .col-md-4 {
      display: -webkit-box;
      display: -webkit-flex;
      display: -ms-flexbox;
      display: flex;
    }

&lt;!-- language: lang-html --&gt;

    &lt;div class=&quot;row flexthis&quot;&gt;
      &lt;div class=&quot;col-md-4 col-sm-6 text-center&quot;&gt;
        &lt;div class=&quot;product&quot;&gt;
          &lt;img src=&quot;img.jpg&quot; alt=&quot;&quot; class=&quot;img-responsive&quot;&gt;
          &lt;h3&gt;Name&lt;/h3&gt;
          &lt;p&gt;Description&lt;/p&gt;
        &lt;/div&gt;
      &lt;/div&gt;
    &lt;/div&gt;

&lt;!-- end snippet --&gt;

  [1]: http://i.stack.imgur.com/FhYyn.jpg
  [2]: http://i.stack.imgur.com/Vkvr0.jpg

Flexbox wraps last column of the first row in Safari

I&#39;m using Bootstrap V4 and the following error is logged in the console;

&gt; Error: Bootstrap tooltips require Tether
&gt; (http://github.hubspot.com/tether/)

I have tried to remove the error by installing Tether but it hasn&#39;t worked. I have &#39;installed&#39; Tether by including the following lines of code;

    &lt;link rel=&quot;stylesheet&quot; href=&quot;http://www.atlasestateagents.co.uk/css/tether.min.css&quot;&gt;
    &lt;script src=&quot;http://www.atlasestateagents.co.uk/javascript/tether.min.js&quot;&gt;&lt;/script&gt;

Have I &#39;installed&#39; tether correctly?

Can anyone help me remove this error?

If you wish to view the error on my site, please click [here][1] and load your console.


  [1]: https://www.atlasestateagents.co.uk

How to fix the error; &#39;Error: Bootstrap tooltips require Tether (http://github.hubspot.com/tether/)&#39;

I just downloaded the source code for Bootstrap 4 alpha 2 and can&#39;t find the class `img-responsive` in it. It exists in Bootstrap 3 source code and I can find it with Notepad++ but in Bootstrap 4s `bootstrap.css` in `dist` folder it doesn&#39;t exist.

What happend to it??

No img-responsive in Bootstrap 4

In Bootstrap v3 I often use the hidden-** classes combined with clearfix to control multi column layouts at different screen widths. For example, 

I could combine multiple hidden-** in one DIV to make my multi columns appear correctly at different screen widths.

As an example if I wanted to display rows of product photos, 4 per row on larger screen sizes, 3 on smaller screens, then 2 on very small screens. The product photos might be different heights so I need the clearfix to ensure the row breaks properly.

Here&#39;s an example in v3...

http://jsbin.com/tosebayode/edit?html,css,output

Now that v4 has done away with these classes, and replaced them with the visible/hidden-**-up/down classes I seem to have to do the same thing with multiple DIVs instead.

Here&#39;s a similar example in v4...

http://jsbin.com/sagowihowa/edit?html,css,output

So I&#39;ve gone from single DIVs to having to add multiple DIVs with lots of up/down classes to achieve the same thing.

From...

    &lt;div class=&quot;clearfix visible-xs-block visible-sm-block&quot;&gt;&lt;/div&gt;

to...

    &lt;div class=&quot;clearfix hidden-sm-up&quot;&gt;&lt;/div&gt;
    &lt;div class=&quot;clearfix hidden-md-up hidden-xs-down&quot;&gt;&lt;/div&gt;
    &lt;div class=&quot;clearfix hidden-md-down&quot;&gt;&lt;/div&gt;

Is there a better way of doing this in v4 that I have overlooked?

Missing visible-** and hidden-** in Bootstrap v4

I am using Bootstrap 4 alpha 2 and taking advantage on cards. 
Specifically, I am working with [this example][1] taken from the official docs. How can I make all cards to be the same height?

All I can think by now is setting the following CSS rule:
    
    .card {
        min-height: 200px;
    }

But that is just a hard coded solution that won&#39;t work in a general case.
The code in my view is the same as the one in the docs i.e:

    &lt;div class=&quot;card-columns&quot;&gt;
      &lt;div class=&quot;card&quot;&gt;
        &lt;img class=&quot;card-img-top&quot; data-src=&quot;...&quot; alt=&quot;Card image cap&quot;&gt;
        &lt;div class=&quot;card-block&quot;&gt;
          &lt;h4 class=&quot;card-title&quot;&gt;Card title that wraps to a new line&lt;/h4&gt;
          &lt;p class=&quot;card-text&quot;&gt;This is a longer card with supporting text below as a natural lead-in to additional content. This content is a little bit longer.&lt;/p&gt;
        &lt;/div&gt;
      &lt;/div&gt;
      &lt;div class=&quot;card card-block&quot;&gt;
        &lt;blockquote class=&quot;card-blockquote&quot;&gt;
          &lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.&lt;/p&gt;
          &lt;footer&gt;
            &lt;small class=&quot;text-muted&quot;&gt;
              Someone famous in &lt;cite title=&quot;Source Title&quot;&gt;Source Title&lt;/cite&gt;
            &lt;/small&gt;
          &lt;/footer&gt;
        &lt;/blockquote&gt;
      &lt;/div&gt;
      &lt;div class=&quot;card&quot;&gt;
        &lt;img class=&quot;card-img-top&quot; data-src=&quot;...&quot; alt=&quot;Card image cap&quot;&gt;
        &lt;div class=&quot;card-block&quot;&gt;
          &lt;h4 class=&quot;card-title&quot;&gt;Card title&lt;/h4&gt;
          &lt;p class=&quot;card-text&quot;&gt;This card has supporting text below as a natural lead-in to additional content.&lt;/p&gt;
          &lt;p class=&quot;card-text&quot;&gt;&lt;small class=&quot;text-muted&quot;&gt;Last updated 3 mins ago&lt;/small&gt;&lt;/p&gt;
        &lt;/div&gt;
      &lt;/div&gt;
      &lt;div class=&quot;card card-block card-inverse card-primary text-xs-center&quot;&gt;
        &lt;blockquote class=&quot;card-blockquote&quot;&gt;
          &lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat.&lt;/p&gt;
          &lt;footer&gt;
            &lt;small&gt;
              Someone famous in &lt;cite title=&quot;Source Title&quot;&gt;Source Title&lt;/cite&gt;
            &lt;/small&gt;
          &lt;/footer&gt;
        &lt;/blockquote&gt;
      &lt;/div&gt;
      &lt;div class=&quot;card card-block text-xs-center&quot;&gt;
        &lt;h4 class=&quot;card-title&quot;&gt;Card title&lt;/h4&gt;
        &lt;p class=&quot;card-text&quot;&gt;This card has supporting text below as a natural lead-in to additional content.&lt;/p&gt;
        &lt;p class=&quot;card-text&quot;&gt;&lt;small class=&quot;text-muted&quot;&gt;Last updated 3 mins ago&lt;/small&gt;&lt;/p&gt;
      &lt;/div&gt;
      &lt;div class=&quot;card&quot;&gt;
        &lt;img class=&quot;card-img&quot; data-src=&quot;...&quot; alt=&quot;Card image&quot;&gt;
      &lt;/div&gt;
      &lt;div class=&quot;card card-block text-xs-right&quot;&gt;
        &lt;blockquote class=&quot;card-blockquote&quot;&gt;
          &lt;p&gt;Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer posuere erat a ante.&lt;/p&gt;
          &lt;footer&gt;
            &lt;small class=&quot;text-muted&quot;&gt;
              Someone famous in &lt;cite title=&quot;Source Title&quot;&gt;Source Title&lt;/cite&gt;
            &lt;/small&gt;
          &lt;/footer&gt;
        &lt;/blockquote&gt;
      &lt;/div&gt;
      &lt;div class=&quot;card card-block&quot;&gt;
        &lt;h4 class=&quot;card-title&quot;&gt;Card title&lt;/h4&gt;
        &lt;p class=&quot;card-text&quot;&gt;This is a wider card with supporting text below as a natural lead-in to additional content. This card has even longer content than the first to show that equal height action.&lt;/p&gt;
        &lt;p class=&quot;card-text&quot;&gt;&lt;small class=&quot;text-muted&quot;&gt;Last updated 3 mins ago&lt;/small&gt;&lt;/p&gt;
      &lt;/div&gt;
    &lt;/div&gt;

  [1]: http://v4-alpha.getbootstrap.com/components/card/#columns


Content Type	Original Author	Original Content on Stackoverflow
Question	ottz0	View Question on Stackoverflow
Solution 1 - Twitter Bootstrap	Andrey Saleba	View Answer on Stackoverflow
Solution 2 - Twitter Bootstrap	sadeq alshaar	View Answer on Stackoverflow
Solution 3 - Twitter Bootstrap	Slinky Sloth	View Answer on Stackoverflow

Bootstrap 4 datapicker.js not included

Twitter Bootstrap Problem Overview

Twitter Bootstrap Solutions

Solution 1 - Twitter Bootstrap

Solution 2 - Twitter Bootstrap

Solution 3 - Twitter Bootstrap

anaconda - graphviz - can't import after installation

Difference between coroutine and future/task in Python 3.5?

Attributions