adds numpy.NaN => np.nan conversion to the strategy updater since numpy2.0 changed that, now it throws errors.

To adjust more of those we can now easily expand on it.
This includes aliases for imports as well.

freqtrade/strategy/strategyupdater.py

@@ -39,6 +39,17 @@ class StrategyUpdater:
         "sell": "exit",
     }
 
+    # Update function names.
+    # example: `np.NaN` was removed in the NumPy 2.0 release. Use `np.nan` instead.
+    module_replacements = {
+        "numpy": {
+            "aliases": set(),
+            "replacements": [
+                ("NaN", "nan"),
+            ],
+        }
+    }
+
     # create a dictionary that maps the old column names to the new ones
     rename_dict = {"buy": "enter_long", "sell": "exit_long", "buy_tag": "enter_tag"}
 
@@ -153,16 +164,24 @@ class NameUpdater(ast_comments.NodeTransformer):
     def visit_Name(self, node):
         # if the name is in the mapping, update it
         node.id = self.check_dict(StrategyUpdater.name_mapping, node.id)
+
+        for mod, info in StrategyUpdater.module_replacements.items():
+            for old_attr, new_attr in info["replacements"]:
+                if node.id == old_attr:
+                    node.id = new_attr
         return node
 
     def visit_Import(self, node):
-        # do not update the names in import statements
+        for alias in node.names:
+            if alias.name in StrategyUpdater.module_replacements:
+                as_name = alias.asname or alias.name
+                StrategyUpdater.module_replacements[alias.name]["aliases"].add(as_name)
         return node
 
     def visit_ImportFrom(self, node):
-        # if hasattr(node, "module"):
-        #    if node.module == "freqtrade.strategy.hyper":
-        #        node.module = "freqtrade.strategy"
+        if node.module in StrategyUpdater.module_replacements:
+            mod = node.module
+            StrategyUpdater.module_replacements[node.module]["aliases"].add(mod)
         return node
 
     def visit_If(self, node: ast_comments.If):
@@ -182,6 +201,12 @@ class NameUpdater(ast_comments.NodeTransformer):
             and node.attr == "nr_of_successful_buys"
         ):
             node.attr = "nr_of_successful_entries"
+        if isinstance(node.value, ast_comments.Name):
+            for mod, info in StrategyUpdater.module_replacements.items():
+                if node.value.id in info["aliases"]:
+                    for old_attr, new_attr in info["replacements"]:
+                        if node.attr == old_attr:
+                            node.attr = new_attr
         return node
 
     def visit_ClassDef(self, node):

tests/test_strategy_updater.py

@@ -42,8 +42,10 @@ def test_strategy_updater_methods(default_conf, caplog) -> None:
     instance_strategy_updater = StrategyUpdater()
     modified_code1 = instance_strategy_updater.update_code(
         """
+import numpy as np
 class testClass(IStrategy):
     def populate_buy_trend():
+        some_variable = np.NaN
         pass
     def populate_sell_trend():
         pass
@@ -62,6 +64,7 @@ class testClass(IStrategy):
     assert "check_exit_timeout" in modified_code1
     assert "custom_exit" in modified_code1
     assert "INTERFACE_VERSION = 3" in modified_code1
+    assert "np.nan" in modified_code1
 
 
 def test_strategy_updater_params(default_conf, caplog) -> None: