ADD file via upload

8.2 探索公交车刷卡数据.py

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+# 代码8-1
+import pandas as pd
+import os
+import matplotlib.pyplot as plt
+
+
+plt.figure(figsize=(8, 4))
+file_list = os.listdir("../data/time")
+for file_name in file_list:
+    if file_name.split(".")[-1] == "csv":
+        df_time = pd.read_csv("../data/time/" + file_name)
+        plt.plot(df_time["date"], df_time["num"], label=file_name)
+
+plt.xticks([5, 10, 15, 20], ['5:00', '10:00', '15:00', '20:00'])
+plt.yticks([0, 100000, 200000, 300000, 400000, 500000, 600000],
+           ['0', '10', '20', '30', '40',  '50', '60'])
+plt.rcParams['font.sans-serif'] = 'SimHei'  # 设置字体为SimHei显示中文
+plt.xlabel('时间点')  # fontproperties参数可以显示相应字体
+plt.ylabel('刷卡人数（单位：万）')
+plt.title('图例')
+plt.legend(("2014-06-09", "2014-06-10", "2014-06-11", "2014-06-12", "2014-06-13"), loc=1)
+plt.show()