np.zeros()

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# np.zeros()
# 返回来一个给定形状和类型的用0填充的数组；
# zeros(shape, dtype=float, order=‘C’)
# shape:形状
# dtype:数据类型，可选参数，默认numpy.float64
# order:可选参数，C：行优先；F：代表列优先
import numpy as np

a1 = np.zeros((2, 5))
# print(a1)
# output
# [[0. 0. 0. 0. 0.]
#  [0. 0. 0. 0. 0.]]

a2 = np.zeros((2, 5), dtype=int)
print(a2)
# output
# [[0 0 0 0 0]
#  [0 0 0 0 0]]