constraints_handler.py 文件源码

def to_dim_times_two(self, bounds):
        """return boundaries in format ``[[lb0, ub0], [lb1, ub1], ...]``,
        as used by ``BoxConstraints...`` class.

        """
        if not bounds:
            b = [[None, None]]
        else:
            l = [None, None]  # figure out lenths
            for i in [0, 1]:
                try:
                    l[i] = len(bounds[i])
                except TypeError:
                    bounds[i] = [bounds[i]]
                    l[i] = 1
            b = []  # bounds in different format
            try:
                for i in range(max(l)):
                    b.append([bounds[0][i] if i < l[0] else None,
                              bounds[1][i] if i < l[1] else None])
            except (TypeError, IndexError):
                print("boundaries must be provided in the form " +
                      "[scalar_of_vector, scalar_or_vector]")
                raise
        return b