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28.py

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+import numpy as np
+import pandas as pd
+import matplotlib as mpl
+import matplotlib.pyplot as plt
+from matplotlib import font_manager
+
+font_path = r'E:\PycharmProjects\pythonProject\simsun.ttc'
+font_prop = font_manager.FontProperties(fname=font_path)
+#支持中文显示
+
+'''
+mpl.rcParams['font.family'] = 'Kaiti'
+# 使用非 unicode 的负号，当使用中文时候要设置
+mpl.rcParams['axes.unicode_minus'] = False
+# %matplotlib inline
+'''
+
+data = pd.read_csv(r'E:\PycharmProjects\pythonProject\航班信息\airport-ontime.csv')
+# data.info()
+
+#将Unnamed这列删除
+
+data.dropna(axis=1, how='all', inplace=True)
+# data.info()
+
+#查看是否有重复数据
+data.duplicated().any()
+data.drop_duplicates(inplace=True)
+# data.info()
+
+# 统计起飞是否延迟 饼图
+
+# print(data['DEP_DEL15'].head())
+
+
+dep_data = data['DEP_DEL15'].dropna()
+dep_delay = dep_data.value_counts()
+dep_delay.name = ''
+dep_delay.plot(kind='pie', labels=['起飞不延迟', '起飞延迟'], autopct='%.2f', textprops={'fontproperties': font_prop})
+plt.title('起飞延迟不延迟情况', {'fontproperties': font_prop})
+plt.show()