python - 类型错误 : an integer is required (got type str) in python

Question

我在 Python 中使用 OpenCV ArUco。我正在尝试生成不同目录的多个代码。为了一次性生成它，我在循环中使用了这个函数。例如list1 =[1,2,3,4],comb = [50,100,250,1000],ids = [1,22,3,45]

def generator(bsize,comb,ids):

    bitsize = [bsize]+['X']+[bsize]
    bitz = ''.join(bitsize)

    dicts = ['DICT']+[bitz]+[comb]
    dictionary = '_'.join(dicts)
    print(dictionary)

    path = ['aruco']+[dictionary]
    print(path)
    path = '.'.join(path)
    print(path)

    aruco_dict = aruco.Dictionary_get(path)
    img = aruco.drawMarker(aruco_dict, ids, bsize)
    cv2.imshow('frame',img)

for i in range(0,7):
    generator(list1[i],list2[i],list3[i])

“路径”的输出是:

aruco.DICT_4X4_1000

之后出现错误:

line 35, in generator
aruco_dict = aruco.Dictionary_get(path)
TypeError: an integer is required (got type str)

如何解决此错误。请帮忙

Answer 1

"aruco.DICT_4X4_1000"是一个字符串，不同于aruco.DICT_4X4_1000，是aruco中的一个属性。

如果您想以编程方式访问 aruco 的属性 DICT_4X4_1000 的值，您 can use :

getattr(aruco, "DICT_4X4_1000")

所以你获取路径的代码应该是:

...
path = getattr(aruco, dictionary)
...