SPATZ migration + proper directory structure

spatz/transforms/failures.py

@@ -0,0 +1,29 @@
+import numpy as np
+
+from numpy.typing import ArrayLike
+from typing import Any, Tuple
+
+from spatz.transforms import Transform
+
+
+class Downtime(Transform):
+    def __init__(self, mu_duration: float, sigma_duration: float) -> None:
+        super().__init__()
+
+        self.__mu = mu_duration
+        self.__sigma = sigma_duration
+        self.__state = 1
+        self.__until = abs(np.random.normal(mu_duration, sigma_duration))
+
+    def get_state(self) -> Tuple[int, float]:
+        return self.__state, self.__until
+
+    def __call__(self, t: float, x: ArrayLike) -> Any:
+        if t >= self.__until:
+            self.__state = 1 - self.__state
+            self.__until = t + abs(np.random.normal(self.__mu, self.__sigma))
+
+        if self.__state == 1:
+            return x
+        
+        return np.zeros_like(x)