rohitg00/ai-engineering-from-scratch · error · ValueError

Cannot reshape {self.size} elements into shape {tuple(new_sh

Error message

Cannot reshape {self.size} elements into shape {tuple(new_shape)}

What it means

Error "Cannot reshape {self.size} elements into shape {tuple(new_shape)}" thrown in rohitg00/ai-engineering-from-scratch.

Source

Thrown at phases/01-math-foundations/12-tensor-operations/code/tensors.py:115

    def reshape(self, new_shape):
        new_shape = list(new_shape)
        neg_idx = -1
        known_product = 1
        for i, s in enumerate(new_shape):
            if s == -1:
                if neg_idx != -1:
                    raise ValueError("Only one dimension can be -1")
                neg_idx = i
            else:
                known_product *= s

        if neg_idx != -1:
            new_shape[neg_idx] = self.size // known_product

        total = reduce(lambda a, b: a * b, new_shape, 1)
        if total != self.size:
            raise ValueError(
                f"Cannot reshape {self.size} elements into shape {tuple(new_shape)}"
            )

        result = Tensor.__new__(Tensor)
        result._data = self._data[:]
        result._shape = tuple(new_shape)
        result._strides = self._compute_strides(result._shape)
        return result

    def squeeze(self, dim=None):
        if dim is not None:
            if self._shape[dim] != 1:
                return self.reshape(self._shape)
            new_shape = list(self._shape)
            new_shape.pop(dim)
            return self.reshape(tuple(new_shape) if new_shape else ())
        new_shape = tuple(s for s in self._shape if s != 1)
        if not new_shape:

View on GitHub (pinned to 39ea8a1c6d)

When it happens

Trigger: Thrown at phases/01-math-foundations/12-tensor-operations/code/tensors.py:115 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of rohitg00/ai-engineering-from-scratch@39ea8a1c6d (2026-08-26). Data as JSON: /api/errors/d93f6da79d3328d3. Report an issue: GitHub.