Are you following the GraphQL with Python guide?
Or are you doing something along the line of creating Flask x GraphQL API and running in to the error
<pre><code class="lang-bash">cannot import name 'PLAYGROUND_HTML' from 'ariadne.constants'
</code></pre>
Long story short, 0.22 does not have PLAYGROUND_HTML and the answers you found on stack overflow to downgrade graphql-core is incorrect.
You can find the solution actually in ariadne documentation of playground @ <a target="_blank" href="https://ariadnegraphql.org/docs/flask-integration">https://ariadnegraphql.org/docs/flask-integration</a>
<pre><code class="lang-python">from ariadne.constants import PLAYGROUND_HTML
## above is replaced with 
from ariadne.explorer import ExplorerGraphiQL
## you can use the following to return an playground HTML
ExplorerGraphiQL().html(None)
</code></pre>
Now onward to next step!

Are you following the GraphQL with Python guide?

Or are you doing something along the line of creating Flask x GraphQL API and running in to the error

```bash
cannot import name 'PLAYGROUND_HTML' from 'ariadne.constants'  
```

Long story short, 0.22 does not have PLAYGROUND\_HTML and the answers you found on stack overflow to downgrade graphql-core is incorrect.

You can find the solution actually in ariadne documentation of playground @ [https://ariadnegraphql.org/docs/flask-integration](https://ariadnegraphql.org/docs/flask-integration)

```python
from ariadne.constants import PLAYGROUND_HTML
## above is replaced with 
from ariadne.explorer import ExplorerGraphiQL
## you can use the following to return an playground HTML
ExplorerGraphiQL().html(None)
```

Now onward to next step!

PLAYGROUND_HTML is no longer available in ariadne version 0.22. There is an alternative you can use however. 

ariadne ver 0.22 and cannot import name 'PLAYGROUND_HTML' from 'ariadne.constants'