I believe this one is your problem:

/dev/mtdbock4 249.5M 225.3M 24.2M 90% /

You only have 24.2MB free on your root partition. pyRadio itself is less than 1MB total but it has a ton of dependencies on python, qt, pyqt4, etc. that go over 20MB total I believe.

There are some scripts around this forum (I believe) that will help you do a listing of all of your installed applications and how much space they take to show you what apps are the biggest. You'll need to remove some bigger applications and reclaim the space on your root partitions before installing some other ones.

I also don't think from the looks of that output that you are running your OS from SD.