Initialisation du repository de Beta

venv/lib/python3.12/site-packages/sympy/physics/biomechanics/_mixin.py

@@ -0,0 +1,53 @@
+"""Mixin classes for sharing functionality between unrelated classes.
+
+This module is named with a leading underscore to signify to users that it's
+"private" and only intended for internal use by the biomechanics module.
+
+"""
+
+
+__all__ = ['_NamedMixin']
+
+
+class _NamedMixin:
+    """Mixin class for adding `name` properties.
+
+    Valid names, as will typically be used by subclasses as a suffix when
+    naming automatically-instantiated symbol attributes, must be nonzero length
+    strings.
+
+    Attributes
+    ==========
+
+    name : str
+        The name identifier associated with the instance. Must be a string of
+        length at least 1.
+
+    """
+
+    @property
+    def name(self) -> str:
+        """The name associated with the class instance."""
+        return self._name
+
+    @name.setter
+    def name(self, name: str) -> None:
+        if hasattr(self, '_name'):
+            msg = (
+                f'Can\'t set attribute `name` to {repr(name)} as it is '
+                f'immutable.'
+            )
+            raise AttributeError(msg)
+        if not isinstance(name, str):
+            msg = (
+                f'Name {repr(name)} passed to `name` was of type '
+                f'{type(name)}, must be {str}.'
+            )
+            raise TypeError(msg)
+        if name in {''}:
+            msg = (
+                f'Name {repr(name)} is invalid, must be a nonzero length '
+                f'{type(str)}.'
+            )
+            raise ValueError(msg)
+        self._name = name