Update _discrete_tune.py

CHANGELOG.md

@@ -5,6 +5,9 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/).
 
 ## [Unreleased]
 
+### Fixed
+- Fixed bug where `DiscreteTune`s returned only one value when called (regardless of input shape) 
+
 ### Added
 - more documentation
 

attune/_discrete_tune.py

@@ -3,6 +3,7 @@
 from typing import Dict, Tuple, Optional
 
 import WrightTools as wt
+import numpy as np
 
 
 class DiscreteTune:
@@ -34,13 +35,39 @@ def __init__(
     def __repr__(self):
         return f"DiscreteTune({repr(self.ranges)}, {repr(self.default)})"
 
-    def __call__(self, ind_value, *, ind_units=None, dep_units=None):
+    def __call__(self, ind_value, *, ind_units=None):
+        """Evaluate the DiscreteTune at specific independent value(s).
+
+        Paramters
+        ---------
+        ind_val: float-like or ndarray
+            The value or values at which to evaluate the DiscreteTune.
+        ind_units: Optional[str]
+            Units of the independent variable.  Default is "nm".
+
+        Returns
+        -------
+        key: str or ndarray
+            The string identifier for the independent value.
+            For an array of ind_val, an array of identifiers is given.
+
+        """
         if ind_units is not None and self._ind_units is not None:
             ind_value = wt.units.convert(ind_value, ind_units, self._ind_units)
-        for key, (min, max) in self.ranges.items():
-            if min <= ind_value <= max:
-                return key
-        return self.default
+        if isinstance(ind_value, np.ndarray):
+            out = np.full(
+                ind_value.shape,
+                self.default,
+                dtype=f"U{max([len(s) for s in self.ranges.keys()])}",
+            )
+            for key, (imin, imax) in self.ranges.items():
+                out[(ind_value >= imin) & (ind_value <= imax)] = key
+            return out
+        else:
+            for key, (imin, imax) in self.ranges.items():
+                if imin <= ind_value <= imax:
+                    return key
+            return self.default
 
     def __eq__(self, other):
         return self.ranges == other.ranges and self.default == other.default