switching to high quality piper tts and added label translations

2026-01-29 23:48:19 +01:00
commit d80c619df9
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+from sympy.assumptions import Predicate, AppliedPredicate, Q
+from sympy.core.relational import Eq, Ne, Gt, Lt, Ge, Le
+from sympy.multipledispatch import Dispatcher
+
+
+class CommutativePredicate(Predicate):
+    """
+    Commutative predicate.
+
+    Explanation
+    ===========
+
+    ``ask(Q.commutative(x))`` is true iff ``x`` commutes with any other
+    object with respect to multiplication operation.
+
+    """
+    # TODO: Add examples
+    name = 'commutative'
+    handler = Dispatcher("CommutativeHandler", doc="Handler for key 'commutative'.")
+
+
+binrelpreds = {Eq: Q.eq, Ne: Q.ne, Gt: Q.gt, Lt: Q.lt, Ge: Q.ge, Le: Q.le}
+
+class IsTruePredicate(Predicate):
+    """
+    Generic predicate.
+
+    Explanation
+    ===========
+
+    ``ask(Q.is_true(x))`` is true iff ``x`` is true. This only makes
+    sense if ``x`` is a boolean object.
+
+    Examples
+    ========
+
+    >>> from sympy import ask, Q
+    >>> from sympy.abc import x, y
+    >>> ask(Q.is_true(True))
+    True
+
+    Wrapping another applied predicate just returns the applied predicate.
+
+    >>> Q.is_true(Q.even(x))
+    Q.even(x)
+
+    Wrapping binary relation classes in SymPy core returns applied binary
+    relational predicates.
+
+    >>> from sympy import Eq, Gt
+    >>> Q.is_true(Eq(x, y))
+    Q.eq(x, y)
+    >>> Q.is_true(Gt(x, y))
+    Q.gt(x, y)
+
+    Notes
+    =====
+
+    This class is designed to wrap the boolean objects so that they can
+    behave as if they are applied predicates. Consequently, wrapping another
+    applied predicate is unnecessary and thus it just returns the argument.
+    Also, binary relation classes in SymPy core have binary predicates to
+    represent themselves and thus wrapping them with ``Q.is_true`` converts them
+    to these applied predicates.
+
+    """
+    name = 'is_true'
+    handler = Dispatcher(
+        "IsTrueHandler",
+        doc="Wrapper allowing to query the truth value of a boolean expression."
+    )
+
+    def __call__(self, arg):
+        # No need to wrap another predicate
+        if isinstance(arg, AppliedPredicate):
+            return arg
+        # Convert relational predicates instead of wrapping them
+        if getattr(arg, "is_Relational", False):
+            pred = binrelpreds[type(arg)]
+            return pred(*arg.args)
+        return super().__call__(arg)