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1.读取数据

data = pd.read_csv("G:\Projects\pycharmeProject\大数据比赛\data\mysql.csv")
print(data.shape)

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2.数据的提取与筛选

2.1 增加某一列

2.1.1 以原数据的索引添加列

data['index'] = data.index

2.1.2 以国家数据添加列

data['country'] = data['国家']

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2.2 删除特定列 drop(columns=‘?’)

data_drop = data.drop(columns='index')

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2.3 删除特定行 — 根据索引删除 drop(index=[?],axis=1)

data_drop_index = data.drop(index=1,axis=1)
data_drop_mulIndex = data.drop(index=[1,2,3,4,5],axis=1)

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2.4 删除特定值的记录

2.4.1 找出特定值所在行进行筛选

方法一 drop(index=data_target_index,axis=1)

data_condition = data['城市'] == '阿坝'
data_target = data.loc[data_condition]
data_target_index = data_target.index
data_drop_target_index = data.drop(index=data_target_index,axis=1)

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方法二 loc[~data_condition]

data_condition = data['城市'].isin(['阿坝'])
data_target = data.loc[data_condition]
data_without_target = data.loc[~data_condition]   # 加个~号

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