Exception: number of labels did not match the number of images

[1183444356]

Hello!
I put four data sets into the program and ran them with errors: number of labels did not match the number of images.
My program is as follows:

    if bTrain:
        images = open(r'G:\Major\Project\SNN\Brain2\MNIST_data\train-images-idx3-ubyte.gz','rb')
        labels = open(r'G:\Major\Project\SNN\Brain2\MNIST_data\train-labels-idx1-ubyte.gz','rb')
    else:
        images = open(r'G:\Major\Project\SNN\Brain2\MNIST_data\t10k-images-idx3-ubyte.gz','rb')
        labels = open(r'G:\Major\Project\SNN\Brain2\MNIST_data\t10k-labels-idx1-ubyte.gz','rb')

Can you tell me how to solve it?
Thank you so much.