[英]Appending multiple lists containing numpy array in Python
我想 append 包含 numpy 数组的多个列表。 我尝试使用append
但它没有 append 不同t
的两个列表。 我介绍了当前和预期的输出。
import numpy as np
N=2
arsigma=[]
for t in range(0,2):
sigma=0.02109*t*np.ones((2*N*(N+1), 1))
arsigma.append(sigma)
arsigma=list(sigma)
print("sigma =",[sigma])
当前的 output 是
sigma = [array([[0.],
[0.],
[0.],
[0.],
[0.],
[0.],
[0.],
[0.],
[0.],
[0.],
[0.],
[0.]])]
sigma = [array([[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109]])]
预期的 output 是
sigma=[array([[0.],
[0.],
[0.],
[0.],
[0.],
[0.],
[0.],
[0.],
[0.],
[0.],
[0.],
[0.]]), array([[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109],
[0.02109]])]
改为使用列表推导:
N = 2
arsigma = [0.02109*t*np.ones((2*N*(N+1), 1)) for t in range(2)]
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