python-3.x - 不支持的格式字符串传递给 numpy.ndarray

Question

假设我有数组:

import numpy as np
x = np.array([1.2334, 2.3455, 3.456], dtype=np.float32)

并想打印:

print('{:.2f}%'.format(x))

它给了我:

unsupported format string passed to numpy.ndarray.__format__

Answer 1

如果您还想要 format

list(map('{:.2f}%'.format,x))
Out[189]: ['1.23%', '2.35%', '3.46%']