我该如何解决这个问题？
Traceback (most recent call last):
File "l3.py", line 45, in <module>
z = solve_minmax(n, a, B, x_min=-1000, x_max=1000)
File "l3.py", line 33, in solve_minmax
dot_B_x = pulp.lpSum([B[i][j] * x[j] for j in range(n)])
TypeError: 'float' object has no attribute '__getitem__'
答案 0 :(得分：7)
__getitem__是一个特殊的python函数，它等同于运算符[]或索引或＆＃34; get item＆＃34;操作
所以，错误基本上是说有一个变量是浮点数。对于这个变量，你可以调用__getitem__函数 - 可能是通过对它进行索引操作。
基于显示行dot_B_x = pulp.lpSum([B[i][j] * x[j] for j in range(n)])作为罪魁祸首的追溯，似乎B，B [i]或x似乎是可能的问题
答案 1 :(得分：4)
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pulp.lpSum([B[i][j] * x[j] for j in range(n)])
这意味着TypeError: 'float' object has no attribute '__getitem__'，B或B[i]都是花车，而您无法使用x。