Rend Subsystems

Rend ships with 2 very useful subsystems, rend and output. They are both used to managed ingesting and outputting structured data. These tools make it easy to use structured data files in your projects and to maker clean, readable output from structured data.

The Rend Subsystem

The rend subsystem is very simple, just a single function needs to be defined, this function is called render. The render function takes the data from the previous stage in the render pipe. This means that data will be a bytestring containing the raw bytes, typically from reading the file, or the out put from a previous render in the pipe. So if the pipe you are using is jinja|yaml then the bytes collected from reading the file will be sent first to the jinja rend plugin, then the return data from the render function inside of the jinja rend plugin will be passed as data to the yaml plugin.

The Output Subsystem

The output subsystem is all about making the output from specific datasets look great! So the single function in the output system is called display. The display function returns a string that can be displayed. Generally speaking this string would then be passed to the python built in print() function.