Need a parser that will help me compare free space of member switches

In a stacked switch, ‘ansible_net_filesystems_info’ of ios_facts module only shows free space of master switch. It doesn’t show space of member switches. But I need to write a script that will check for certain amt of free space in EVERY member switch before copying ios image.

I thought of making ansible store free space of every member switch in a custom variable and then use parsing to compare free space. But the problem is that Pyats/Genie parser (the only parser i finally managed to understand) doesn’t support below command (it only supports ‘sh bootflash:’ which doesn’t work with my switch model). Is there any other parser that can help me achieve my objective?

sh flash2: | i bytes free

122185728 bytes total (9308672 bytes free)

On a separate note, i have gone thorugh ansible documentation and several sites to understand parsing but i still can’t make sense of it. Is there any tutorial that heps me understand parsing easily? I have never struggled to understand any other ansible concept like the way i struggled for parsing?

Thanks in advance.