画loss曲线图并使其平滑，做滤波处理

import numpy as np
import  matplotlib.pyplot as plt
import pandas as pd
# 读取存储为txt文件的数据
def data_read(dir_path):
    with open(dir_path, "r") as f:
        raw_data = f.read()
        # data = raw_data[1:-1].split(" ,")   # [-1:1]是为了去除文件中的前后中括号"[]"
        data = raw_data