Function get_recursion_depth

Lib/test/support/__init__.py:2472–2493

Get the recursion depth of the caller function. In the __main__ module, at the module level, it should be 1.

()

    testcase.assertRaisesRegex(TypeError, msg, tp.__new__, tp, *args, **kwds)

def get_recursion_depth():
    """Get the recursion depth of the caller function.

    In the __main__ module, at the module level, it should be 1.
    """
    try:
        import _testinternalcapi
        depth = _testinternalcapi.get_recursion_depth()
    except (ImportError, RecursionError) as exc:
        # sys._getframe() + frame.f_back implementation.
        try:
            depth = 0
            frame = sys._getframe()
            while frame is not None:
                depth += 1
                frame = frame.f_back
        finally:
            # Break any reference cycles.
            frame = None

    # Ignore get_recursion_depth() frame.
    return max(depth - 1, 1)

def get_recursion_available():
    """Get the number of available frames before RecursionError.