sunder | minimal framework for Service Workers | Key Value Database library

I am learning Mulesoft 4 and trying to run a filter on a list of books. In the Transform message, there are no errors and in the preview, the books are filtered by price as expected.

When I run the request in my REST client, I get the following 500 Server Error error. When I remove the filter, I get a successful post in REST. I set a breakpoint on the Transform component and got the error below. How can I fix this?

Books input payload

Detailed error description

I am new to Swift and IOS development, and I am trying to display fetched JSON data onto a text label.

Essentially, my goal is to display only the first object of the following API call result onto a text label (see example further down)

JSON to decode:

I am very much a beginner at using XSLT and I have only recently begun learning it. I am having trouble with trying to print a certain value to display in HTML format based on the XML file below. Essentially I want the HTML page created by the XSL file to display all of the book ID's from only the Fantasy genre, to which they include 'bk102, bk102, bk104, and bk105'. I have tried myself for a while but honestly am not sure how to do this.

Any help would be widely appreciated, sorry for the trouble and thank you in advance.

XML File

I need to understand this concept wherein we can use the dot (.) in the variable name within a function definition. There's no class definition nor a module here and Python is not supposed accept a variable name that includes a dot.

I'm trying to set up an Enum that will return None if the value is not found. The documentation mentions a function _missing_, but does not explain any of the details regarding the function:

_missing_ – a lookup function used when a value is not found; may be overridden

After some looking around, it seems this is a classmethod with the signature cls, value, so I tried to set it up, and its not working.

I am using windows OS and python version 3.7.1. I would like to launch a word file in its default MSword executable using python.

Please don't treat this as duplicate question because I have tried solutions given in few earlier questions similar to these. However, I could not get the desired result.

My code:

I want to make a label behave as button and code for it in .kv file. I referred to the documentation, in which it was mentioned we have to use @ in the rule to inherit properties of button behavior. I tried the following code but it is giving errors. kindly help

tut12.py

This is my XML file that I need to parse:

If I have a functionally created enum.Enum in python (3.7 in this case), how do I retrieve the name of the class from it?