我需要帮助来解决这个问题。我不确定出了什么问题，但错误依然存在。环顾四周，但没有发现类似的问题。

import matplotlib.pyplot as plt
from PIL import Image
import os
import numpy as np
from skimage import io
from keras.preprocessing.image import ImageDataGenerator
from matplotlib import cm
from mpl_toolkits.axes_grid1 import ImageGrid
import math
%matplotlib inline
import keras
import tensorflow as tf
from keras.models import Model
batch_size=32
datagen_args = dict(rotation_range=20,
    width_shift_range=0.2,
    height_shift_range=0.2,
                   rescale=1./255)
datagen = ImageDataGenerator(**datagen_args)
train_datagenerator = datagen.flow_from_directory('/content/drive/MyDrive/cats_dogs_small/train',target_size=(128,128),
                                            batch_size=batch_size,interpolation="lanczos",shuffle=True)
valid_datagenerator = datagen.flow_from_directory('/content/drive/MyDrive/cats_dogs_small/validation',target_size=(128,128),
                                            batch_size=batch_size,interpolation="lanczos",shuffle=True)
epochs = 25
hist = Model.fit_generator(train_datagenerator, 
                           steps_per_epoch= math.ceil(train_datagenerator.samples//batch_size),
                           epochs=epochs, validation_data=valid_datagenerator, validation_steps=math.ceil(valid_datagenerator.samples//batch_size),verbose = 1, workers=8)

错误消息如下所示：

TypeError                                 Traceback (most recent call last)
<ipython-input-69-178574fd407f> in <module>()
      2 hist = Model.fit_generator(train_datagenerator, 
      3                            steps_per_epoch= math.ceil(train_datagenerator.samples//batch_size),
----> 4                            epochs=epochs, validation_data=valid_datagenerator, validation_steps=math.ceil(valid_datagenerator.samples//batch_size),verbose = 1, workers=8)
TypeError: fit_generator() missing 1 required positional argument: 'generator'