Pandas メモ

以下, Pandas のオブジェクトは df

読み込み

df = pd.read_csv('train.csv')

列の取り出し

df['date','num_sold'](/Himeyama/himeyama/wiki/'date','num_sold')

条件

条件

(df['country'] == 'Finland')

複数条件

(df['country'] == 'Finland') & (df['store'] == 'Mart')

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CSV の書き込み

https://pandas.pydata.org/pandas-docs/stable/user_guide/10min.html#getting-data-in-out

df.to_csv("foo.csv")

pickle 書き込み

https://pandas.pydata.org/pandas-docs/stable/user_guide/io.html#pickling

df.to_pickle("foo.pkl")

pickle 読み込み

pd.read_pickle("foo.pkl")