add

ccxt/static_dependencies/ethereum/utils/module_loading.py

@@ -0,0 +1,31 @@
+from importlib import (
+    import_module,
+)
+from typing import (
+    Any,
+)
+
+
+def import_string(dotted_path: str) -> Any:
+    """
+    Import a variable using its path and name.
+
+    :param dotted_path: dotted module path and variable/class name
+    :return: the attribute/class designated by the last name in the path
+    :raise: ImportError, if the import failed
+
+    Source: django.utils.module_loading
+    """
+    try:
+        module_path, class_name = dotted_path.rsplit(".", 1)
+    except ValueError:
+        msg = f"{dotted_path} doesn't look like a module path"
+        raise ImportError(msg)
+
+    module = import_module(module_path)
+
+    try:
+        return getattr(module, class_name)
+    except AttributeError:
+        msg = f'Module "{module_path}" does not define a "{class_name}" attribute/class'
+        raise ImportError(msg)