‘csrf()‘ is deprecated since version 6.1 and marked for removal ；‘csrf()‘自6.1版起已弃用，并标记为删除

完整代码如下，请帮忙解析问题文件1：src/utils.py python 复制 import pandas as pd def load_employee_data(): """加载并预处理就业数据""" df = pd.read_csv('../data/employee.csv', encoding='utf-8-sig') # 提取年份 df['年份'] = df['指标'].str.extract('(\d+)').astype(int) # 列重命名 df = df.rename(columns={ '就业人员(万人)': 'total', '第一产业就业人员(万人)': 'primary', '第二产业就业人员(万人)': 'secondary', '第三产业就业人员(万人)': 'tertiary' }) return df 文件2：src/plot_functions.py python 复制 import matplotlib.pyplot as plt import numpy as np from matplotlib.animation import FuncAnimation def set_chinese_font(): """设置中文字体""" plt.rcParams['font.sans-serif'] = ['SimHei'] # Windows plt.rcParams['axes.unicode_minus'] = False def plot_question1(): """题目1：三条函数曲线""" x = np.linspace(-2*np.pi, 2*np.pi, 400) beta = 2 y1, y2, y3 = x**2, np.cos(2*x), np.sin(beta*x) # 主图 plt.figure(figsize=(10, 6)) plt.plot(x, y1, 'r--', label=r'$y_1 = x^2$') plt.plot(x, y2, 'b:', label=r'$y_2 = \cos(2x)$') plt.plot(x, y3, 'g-', label=r'$y_3 = \sin(2x)$') plt.legend() plt.title('题目1 - 函数曲线对比') plt.savefig('../output/q1_main.png') # 子图 fig, axs = plt.subplots(3, 1, figsize=(10, 12)) for i, (y, title) in enumerate(zip([y1, y2, y3], ['$y_1$', '$y_2$', '$y_3$'])): axs[i].plot(x, y) axs[i].set_title(title) plt.savefig('../output/q1_subplots.png') def plot_question2(): """题目2：正弦函数曲线""" x = np.linspace(0, 2*np.pi, 200) y = np.sin(x) plt.figure(figsize=(8, 5)) plt.plot(x, y, 'purple', label=r'$y = \sin(x)$') plt.xticks(np.arange(0, 2.1*np.pi, np.pi/2), ['0', r'$\pi/2$', r'$\pi$', r'$3\pi/2$', r'$2\pi$']) plt.legend() plt.title('题目2 - 正弦曲线') plt.savefig('../output/q2_sin.png') def plot_question3(df): """题目3：趋势分析图""" plt.figure(figsize=(14, 7)) markers = {'primary': ('green', '^'), 'secondary': ('blue', 's'), 'tertiary': ('