TypeError: an integer is required (got type str) in python

Question

I am working with OpenCV ArUco in Python. I am trying to generate multiple codes of different directories. To generate it in a single time I am using this function in a loop. For example 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])

the output of 'path' is:

aruco.DICT_4X4_1000

after that I am getting error:

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

How do I resolve this error. Please help

Answer 1

"aruco.DICT_4X4_1000", a string, is different from aruco.DICT_4X4_1000, an attribute in aruco.

If you want to programmatically access aruco's value for the attribute DICT_4X4_1000, you can use:

getattr(aruco, "DICT_4X4_1000")

So your code for getting path should be:

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