fix: use numbers.Real for checking type

np.float32 are not float for isinstance, let's use a more generic checking.

Author: paquiteau

src/modopt/base/types.py

@@ -6,6 +6,7 @@
 
 """
 
+import numbers
 import numpy as np
 from modopt.interface.errors import warn
 
@@ -68,14 +69,14 @@ def check_float(input_obj):
     check_int : related function
 
     """
-    if not isinstance(input_obj, (int, float, list, tuple, np.ndarray)):
+    if not isinstance(input_obj, (int, numbers.Real, list, tuple, np.ndarray)):
         raise TypeError("Invalid input type.")
     if isinstance(input_obj, int):
         input_obj = float(input_obj)
     elif isinstance(input_obj, (list, tuple)):
         input_obj = np.array(input_obj, dtype=float)
     elif isinstance(input_obj, np.ndarray) and (
-        not np.issubdtype(input_obj.dtype, np.floating)
+        not np.issubdtype(input_obj.dtype, numbers.Real)
     ):
         input_obj = input_obj.astype(float)
 
@@ -117,9 +118,9 @@ def check_int(input_obj):
     check_float : related function
 
     """
-    if not isinstance(input_obj, (int, float, list, tuple, np.ndarray)):
+    if not isinstance(input_obj, (int, numbers.Real, list, tuple, np.ndarray)):
         raise TypeError("Invalid input type.")
-    if isinstance(input_obj, float):
+    if isinstance(input_obj, numbers.Real):
         input_obj = int(input_obj)
     elif isinstance(input_obj, (list, tuple)):
         input_obj = np.array(input_obj, dtype=int)

src/modopt/opt/algorithms/base.py

@@ -3,6 +3,7 @@
 from inspect import getmro
 
 import numpy as np
+import numbers
 from tqdm.auto import tqdm
 
 from modopt.base import backend
@@ -192,7 +193,7 @@ def _check_param(self, param_val):
             For invalid input type
 
         """
-        if not isinstance(param_val, float):
+        if not isinstance(param_val, numbers.Real):
             raise TypeError("Algorithm parameter must be a float value.")
 
     def _check_param_update(self, param_update):

src/modopt/signal/positivity.py

@@ -7,6 +7,7 @@
 
 """
 
+import numbers
 import numpy as np
 
 
@@ -93,13 +94,13 @@ def positive(input_data, ragged=False):
            [1, 2, 3]])
 
     """
-    if not isinstance(input_data, (int, float, list, tuple, np.ndarray)):
+    if not isinstance(input_data, (int, numbers.Real, list, tuple, np.ndarray)):
         raise TypeError(
             "Invalid data type, input must be `int`, `float`, `list`, "
             + "`tuple` or `np.ndarray`.",
         )
 
-    if isinstance(input_data, (int, float)):
+    if isinstance(input_data, (int, numbers.Real)):
         return pos_thresh(input_data)
 
     if ragged: