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You can onProgressChanged parameter and show the loader. You can also use LinearProgressIndicator (check commented code). Check the following example

Remove

The reason you are getting an error is because it's a compile error. You cannot attempt to make the same object twice (or more) within a single batch, even if only 1 (or less) of those DDL statements would be run. For example even this produces an error, despite that neither INTO could ever be be run (as 1 != 2 and 2 != 3):

Use reduce and inside the reduce call back check if the item is present in both accessArray & access . Create an object and the item present in both array set the value of checked to true or false

You should move your images out of the application side of your code into a more public level.

Generally people store their public assets I.e Imgs/Js/Css at base level.

Eg /var/www/html/site/assets/images/ this means when referencing your assets you simply need to use ./images/logo_example.png rather than hoping/worrying whether the assets will be in the right place relative the script you are running.

It also means when serving this code to the public you can secure your application code from any direct access while still allowing access to the assets.

So in short, move your images to the base /var/www/html/site/assets/images/ and from your script instead of:

You can use the if statement in a lambda function, but it has to return something everytime, so you can do :

If df is the dataframe and s is the series, df-s would do. Pandas will do broadcasting just like numpy.

EDIT: My previous answer did not explain the problem very well. Here is another attempt.

You are having this problem because transform is flawed. To find out why, let's see what lifetimes the compiler has inferred for transform: