读取CSV到浮点数组

Question

我需要将这个CSV读到一个浮点数组中。我是python的新手，不确定如何转换，因为当我在CSV中读到它时，它显示我正在使用"Dictreader“类型，因此我尝试进行转换。谢谢!

我所在位置的屏幕截图

   import csv
    with open('NP.csv') as csvfile:
        NP = csv.DictReader(csvfile)
    with open('A.csv') as csvfule:
        A = csv.DictReader(csvfile)

    [r, c] = size(NP);
    [r2, c2] = size(A);

    for i in range(0, r):
        for j in range(0, c):
            NP(i,j) = float(NP(i,j));
    for i in range(0, r2):
        for j in range(0, c2):
            A(i,j) = float(A(i,j));

Answer 1

如果您尝试读取仅包含浮点数的CSV文件，则可以执行以下操作：

import csv

def read_csv(filename):
    with open(filename, newline='') as f_input:
        return [list(map(float, row)) for row in csv.reader(f_input)]

NP = read_csv('NP.csv')
A = read_csv('A.csv')

因此，如果NP.csv包含：

11.11,22.22,33.33,44.44
55.55,66.66,77.77,88.88

NP现在将包含：

[[11.11, 22.22, 33.33, 44.44], [55.55, 66.66, 77.77, 88.88]]

在Python 3.x中测试