英文:
Removing elements from a list and modifying another list in Python
问题
import numpy as nparJ_new = []CB = [[[]], [np.array([9.75016872e-05]), np.array([0.00019793]), np.array([0.0001007])], [np.array([0.0002704])]]J = [32, 1, 35]for i in range(0, len(CB)):if len(CB[i]) != 0:J_new = J[i]arJ_new.append(J_new)J_new = list(arJ_new)print(J_new)
当前输出是
[32, 1, 35]
期望输出是
[1, 35]
英文:
I have a list CB containing many sublists with numpy arrays. I want to identify the empty lists and generate a new list J_new by removing the specific element. I present the current and expected output.
import numpy as nparJ_new=[]CB = [[[]], [np.array([9.75016872e-05]), np.array([0.00019793]), np.array([0.0001007])], [np.array([0.0002704])]]J=[32,1,35]for i in range(0,len(CB)):if len(CB[i])!=0:J_new=J[i]arJ_new.append(J_new)J_new=list(arJ_new)print(J_new)
The current output is
[32, 1, 35]
The expected output is
[1,35]
答案1
得分: 1
通过使用 numpy（检查大小）进行筛选：
j_new = [J[i] for i, a in enumerate(CB) if np.array(a).size != 0]
[1, 35]
英文:
By means of numpy (check size) filtering:
j_new = [J[i] for i, a in enumerate(CB) if np.array(a).size != 0]
[1, 35]
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