cdf7a78f61adc84cff1de0d6bad9d54c263c598c,opt_einsum/contract.py,,_core_contract,#,426

Before Change

    // Start contraction loop
    for num, contraction in enumerate(contraction_list):
        inds, idx_rm, einsum_str, remaining, blas_flag = contraction
        tmp_operands = []
        for x in inds:
            tmp_operands.append(operands.pop(x))

        // Do we need to deal with the output?
        handle_out = specified_out and ((num + 1) == len(contraction_list))

After Change

        // check if we are performing the pre-pass of an expression with constants
        if parse_constants:
            // if so, keep contracting until we find any non-constant operators, then break out
            operands_copy = list(operands)
            if any(operands_copy.pop(x) is None for x in inds):
                return operands, contraction_list[num:]

        tmp_operands = [operands.pop(x) for x in inds]

        // Do we need to deal with the output?
        handle_out = specified_out and ((num + 1) == len(contraction_list))

Instances