我在main.py中有以下源代码

Me.Py

import data_utils as du

X_train1, Y_train1, groundtruth_train1= du.loaddata(train_file, "adjust_gamma", 0.8)
X_train2, Y_train2, groundtruth_train2= du.loaddata(train_file, "adjust_gamma", 1.2)
X_train3, Y_train3, groundtruth_train3= du.loaddata(train_file, "scale_image", 0.5)
X_train4, Y_train4, groundtruth_train4= du.loaddata(train_file, "scale_image", 0.8)
X_train5, Y_train5, groundtruth_train5= du.loaddata(train_file, "scale_image", 1.5)
X_train6, Y_train6, groundtruth_train6= du.loaddata(train_file, "scale_image", 2.0)
X_train7, Y_train7, groundtruth_train7= du.loaddata(train_file, "compress_jpeg", 70)
X_train8, Y_train8, groundtruth_train8= du.loaddata(train_file, "compress_jpeg", 90)

main.py将读取几个图像,应用图像转换,将它们划分为块(这些是我的x_训练输出),并获取图像标签(y_训练和groundtrust_训练)。图像转换由带参数的字符串定义(例如“Adjust_Gamma”等)。

现在,load_data.py是基于这个答案构建的。 about how to pass functions with arguments to another function

DATAUTULYS.PY

def loaddata(file_images, function_name, parameter):

x = []
y = []

with open(file_images) as f:
    images_names = f.readlines()
    images_names = [a.strip() for a in images_names]

    j=0

    for line in images_names:

        j=j+1

        line='image_folder/' + line
        img = cv2.imread(img_path)
        img=perform(eval(function_name)(img,parameter)) 
        ...

执行的函数将接收函数名(如在main.py中看到的字符串)及其参数(numpy数组中的图像和参数)。执行的功能详细如下:

def perform(fun, *args):
fun(*args)

def adjust_gamma(image, gamma):
   invGamma = 1.0 / gamma
   table = np.array([((i / 255.0) ** invGamma) * 255
      for i in np.arange(0, 256)]).astype("uint8")
   return cv2.LUT(image, table)

def compress_jpeg(image, compression_factor):
   encode_param=[int(cv2.IMWRITE_JPEG_QUALITY), compression_factor]
   result, encimg=cv2.imencode('.jpg', image, encode_param)
   decimg=cv2.imdecode(encimg, 1)
   return decimg

def scale_image(image, scaling_factor):
   resized_image=cv2.resize(image, (scaling_factor, scaling_factor))
   return resized_image 

我尝试使用eval函数,以便传递的字符串可以被视为函数名( This answer inspired me to do that )但是,当我运行代码时,会得到以下错误:

文件 “My.Py”, 第32行,做实验

x train1,y train1,groundtrust train1=du.loaddata(train file,“adjust gamma”,0.8)

文件 “数据实用程序.py”, 第29行,在LoadData中

img=执行(eval(函数名)(img,参数))文件“data_utils.py”,

第171行,执行中 fun(*args)typeerror:“numpy.ndarray”对象不可调用

那么,我该如何解决我的问题呢?如何使用函数名作为字符串将函数作为参数传递给另一个函数?