bool

.gitignore

@@ -191,3 +191,5 @@ freeride/__pycache__/base.cpython-311.pyc
 *.pyc
 *.pyc
 *.pyc
+*.pyc
+*.pyc

freeride/base.py

@@ -80,6 +80,9 @@ def __call__(self, x):
         else:
             raise ValueError(f"{self.x}={x} is outside of the function domain, {self._domain}.")
 
+    def __bool__(self):
+        return not self.is_undefined
+
     def set_symbols(self, symbols):
         self.symbols = symbols
         if isinstance(symbols, str):

freeride/curves.py

@@ -280,6 +280,9 @@ def __init__(self, intercept=None, slope=None, elements=None, inverse=True):
         self.intercept = intercept
         self.slope = slope
 
+    def __bool__(self):
+        return bool(np.any([bool(el) for el in self.elements]))
+
     @classmethod
     def from_two_points(cls, x1, y1, x2, y2):
         """