# Subsystems (Don't Use)
## A Warning
For Python, while it is possible to create a Subsystem class, they don't actually work
Subsystems can be set up similarly to Blueprint Function Libraries with the added expectation of supporting variables:
```python
@unreal.uclass()
class PyEditorSubsystem(unreal.EditorSubsystem):
value = unreal.uproperty(str)
def __init__(self):
super().__init__()
self.value = 5
@unreal.ufunction(static=True)
def basic_function_test():
print("Running python!")
pass
```
Unreal will present it as though it is a valid subsystem in the Blueprint Graph:
Unfortunately, this will result in LogScript warnings when run:
It does provide the functions directly in the right click menu, and they will work during your immediate session:
But it's a trap, the next time you open the Editor it will have a compile error and look like this when you refresh that node:
***
## Summary: Do Not Use
Subsystems should be avoided until proper support is added for them in Python.
