Question

如何在二维数组中添加列值？例如

[[11.9, 12.2, 12.9],
 [15.3, 15.1, 15.1], 
 [16.3, 16.5, 16.5],
 [17.7, 17.5, 18.1]]

我希望它导致：

[61.2,61.3,62.6]

到目前为止我已尝试过这个：

Btotals.append(sum(float(x)) for x in zip(totals))

然而它给了我这个：

[<generator object <genexpr> at 0x02A42878>]

Answer 1

你需要首先解压缩参数。

a = [[11.9, 12.2, 12.9],
    [15.3, 15.1, 15.1], 
    [16.3, 16.5, 16.5],
    [17.7, 17.5, 18.1]]
result = [sum(x) for x in zip(*a)]
>>> [61.2, 61.3, 62.6]

Answer 2

如果#include <iostream> int x = 0; class MyClass { private: int x; public: MyClass() : x(0) {} void test(int x) { this->report(x); std::cout << "Doing some magic...\n"; this->x += x; this->report(x); } void report(int x) { std::cout << "this->x = " << this->x << '\n'; std::cout << "x = " << x << '\n'; } }; int main() { MyClass c; c.report(); x += 123; c.test(x); x += 456; c.test(x); c.report(); }是包含2d数组的变量，请尝试

array

二维数组python中所有列的总和

2 个答案: