问题描述
我想将 a = [1,2,3,4,5] 转换为 a_string = "1 2 3 4 5".真正的 numpy 数组非常大(50000x200),所以我认为使用 for 循环 太慢了.
I want to convert a = [1,2,3,4,5] into a_string = "1 2 3 4 5". The real numpy array is quite big (50000x200) so I assume using for loops is too slow.
推荐答案
你可以使用 join 方法 from string:
You can use the join method from string:
>>> a = [1,2,3,4,5] >>> ' '.join(map(str, a)) "1 2 3 4 5"