创建一个通过读取多个CSV文件创建字典的类- Python

import csv
import os

class CSVReader:
    def __init__(self, file_paths):
        self.file_paths = file_paths

    def read_csv_files(self):
        data_dict = {}
        for file_path in self.file_paths:
            if os.path.isfile(file_path) and file_path.endswith('.csv'):
                with open(file_path, 'r') as csv_file:
                    csv_reader = csv.DictReader(csv_file)
                    for row in csv_reader:
                        for key, value in row.items():
                            if key in data_dict:
                                data_dict[key].append(value)
                            else:
                                data_dict[key] = [value]
            else:
                print(f"Invalid file path or file format: {file_path}")
        return data_dict

file_paths = ['file1.csv', 'file2.csv', 'file3.csv']
csv_reader = CSVReader(file_paths)
data_dict = csv_reader.read_csv_files()
print(data_dict)